Tell your D that the day of coordinator is your gift to yourself so you can enjoy the wedding without worrying about all the small details that you haven’t considered. For example, if your reception is not at the church, you may likely need someone to transport personal items for the wedding party (purses, clothes, etc.). I wish I had put the wedding planner in charge of holding on to the cd of wedding music that I left on a table that was later taken over by my xH’s family. CD of audio for pre-wedding music & ceremony is in a landfill somewhere now. We almost lost the antique handkerchief that was wrapped around the bridal bouquet because the florist sent someone new to pick up the flowers and she took the bridal bouquet with my mom’s handkerchief that had been used for 3 generations. Luckily, that one was a save due to my efforts after the fact. Without a coordinator as a go-to, the logical person to ask about any loose ends will be MOB. Get someone who is experienced and who can run through the wedding issues beforehand so he/she knows how you want things handled.
“although I do have a sister who is perfect for the job!”
I’d suggest giving your sister the job. If she’s the type that is good at it, she might be thrilled as take charge type people relish responsibilities like that.
Honestly, for a smallish wedding, I don’t think it is necessary. I certainly did not have one at my own wedding of 120 people. My guess is most of us didn’t have one at our weddings as it seems to be a phenomenon that surfaced in the past decade. It’s possible to handle things by divvying up clearly defined responsibilities amongst responsible people ahead of time.
Ha – I am @2VU0609 and my daughter is @doschicos !
I think my other issue would be, How much faith would I have in that person to carry out their duties? If I have to take the time to carefully lay out all I want them to do, every little detail (using the examples given in post 2301) I might as well just coordinate with others who will do it for free or do it myself.
I guess maybe I’m a bit of a control freak because I think I’d have a hard time having confidence in someone I don’t have a background with. If I get to pick and choose - sister, friend, etc. - I know who to trust based on past experience. 
On the other hand, if you get an experienced day-of coordinator, they have likely experience the 150 “things that can go wrong even when you don’t plan on it” in previous events and can jump through the hoops to make things right.
You can often hire them for partial day, certain hours - your choice. It’s sort of rental car insurance (or whatever comparison) - you might not need it, but if you do, you’ll be so glad you had it.
Often wedding planners/coordinators have helpers–especially if there are multiple arrangements to oversee. My D and son-in-law had a planner and if I were to do it again, I would spend the money and hire her just for the wedding day.
I do see a coordinator as a form of control- of your own time and pleasure. You want some extra pictures and the photog is doing something in another corner? Let someone else find him or her. Someone gets woozy and needs fresh air? Let the coordinator deal with it, not you or a relative. The venue contact is concerned with food delivery, getting an extra chair for that table, getting the cake cut and served. Sis might get involved in a conversation and miss that it’s time for some detail. Of course, not if this costs some crazy amount. It’s going to be your own choice.
My daughter is getting married in about two weeks 
and I am starting to get really anxious about guest arriving from out of town, family who will be staying with me and all the last minute stuff I need to take care of. My daughter does have a wedding planner and I find that comforting to know that I don’t have to be on top of everything and can concentrate on just her and family. I really don’t want to be coordinating photography, videos and the decorations. I want to enjoy the day. IMHO a smaller wedding would be be worth the offset money needed for someone orchestrating the affair and already has the connections and experience to do the job.
@runnersmom , we also are the address for gifts. LOL.
My daughter’s venue provided their own coordinator and tried to convince me that I did not need to hire anyone else as they would handle everything. Well, they handled what they wanted to handle!
For example, the cocktail hour was in the garden area of the historic home where the wedding and reception was held. When going over the details with the venue, I asked about chairs for the area as the grandparents were 85, 86 and 92. I wanted to make sure they were able to sit down as I knew my dad could not stand and the weather might have been hot. I was told they could put chair out, but if someone felt they needed to sit, they could ask at that time, and a sit would be brought out, but it couldn’t be done beforehand
DD and I are going to look at channel set rings for her wedding band. FSIL is ‘stressed out’ with his current responsibilities and is happy with whatever DD selects. So a nice mother/dau activity. Will also review her wedding planning book - the one she was gifted is “The Knot Ultimate Wedding Planner and Organizer” by Clarkson Potter Publishers (2012) - it is a spiral 176 page with 8 tabbed sections.
^What is the best Wedding Planner? overall?
We had great success with the coordinators at D1 and D2’s venue. We talked several times, made a plan and the women executed the plans perfectly. Absolutely no issues. We were thrilled.
We are using the planner at the venue. It’s not a complicated affair…should be fine.
oops, I meant to ask if you can suggest a wedding planner book…
D’s fiance just got a job in our area & they will be moving back the week after Easter … she is a consultant, so can live anywhere. It is going to be so much easier for planning purposes to have her back in the area (not to mention the fact that I am excited to have her around again!).
So DD found the wedding ring style she likes - it is a pave setting (that is a new one to me…). So working with our jeweler next week on it - he will either make a ring up or order it, and also order the groom’s ring.
The groom’s parents have a set budget for the rehearsal dinner. I told DD that we can help with budget overage costs. Groom’s dad has health issues, mom can only work PT and they don’t want to dip into Roth IRA money, understandably. DD has been paying a lot of things 1/2 up front instead of the 10% because she wants to keep having things paid for.
Going over a few wedding things tonight yet, but feel like we are getting there. DD is meeting with the floral person the week after Easter, making her selections.
Men’s suits will be ordered - sending in payment for that.
Good think my new (PT) job is working out to help with cash flow…
Congrats @kelsmom !!
@SOSConcern I’m sure your generosity is much appreciated and will be paid back in spades with a strong relationship with SIL and his family.
Congrats @SOSConcern !