I am counselor at a public high school in CA and am all for the CSU system. SDSU has a very good business program and San Diego is a great place to live. With that being said, here are a few things you may or may not know:
The average student can take over 5 years to graduate-one student we had who attended finally resorted to driving up to CSU Fullerton to get his last few classes. Very, very impacted here. When you visit, ask around. I'm sure you will find this to be true.
The cost of attendance at SDSU is $17,000+ for living on campus. I know you have "no tuition" but the fees, living expenses etc. add up. San Diego is expensive. Look it up
CSUMentor
If you were elegible for Cal Grant, you will not get any $ if you go to school out of state.
In the end, you want to be happy with your choice. I don't really hear passion from you about SDSU....ALso, you mentioned several pricey private schools but focused on Indiana. Only you know if it's worth the money. You are the one going to school everyday and living the life. You should make the choice. You.
I also suggest looking into the books College *******. I recently added these to my office collection and they are a huge hit with the seniors. There is great info,from enrolled students, on SDSU. They rank and discuss all sorts of areas. Not sure about Indiana.
Good luck and go with your gut.