So - as someone with an MBA and someone who works with MBAs and non-MBAs - where you go to school is less an issue.
The reason - no “real school” will take you for an MBA without two years plus work experience. And your experience will matter most. Not that you have a great job - but that you have a job and do something that can relate and add to classroom discussion.
My company hires undergrads and have hired some MBAs who went through. Guess what, one makes $42K or so to start. The MBAs - $42K or so. It’s wasted.
Now you might say - well if you have a more pedigree school it can get you into a better MBA. Perhaps. but there’s people from South Dakota State and Boise State and Alaska Anchorage, etc. at top 20 MBA programs too.
Again, your money. We just decided that even though we can afford more pedigree, should we - Miami being one of the schools - and made the choice that we shouldn’t. Nonetheless, I think any of your choices again will serve just find for grad school - bu it’s the work experience that matters most.
Once you get past the Ivies/Duke/Stanford, etc. - Miami, SMU, Dayton, IU, Arizona 
- it doesn’t matter - and even if you end up at SMU and don’t major in finance - it’s not going to impact the MBA. I was a history/journalism dual major at Syracuse who failed in journalism, used to be an outside sales guy before grad school - and I got through just fine.
Your son has a bright future and obviously a great mom. I’ll shut up now - i’ve pontificated long enough!!