It's between 5 and 15 minutes to travel from the Sarasota/Bradenton airport to Evo Athletics and IMG Academy. It's a 1 hour drive to those locations from TPA, but you can get non-stop flights. Orlando is about 2 hours, but with non-stop flights as well. Ft. Myers and PIE have non-stop flights from the east coast and MidWest.
https://www.imgacademy.com/travel-and-planning
I understand one of the problems with the specific SoCal bid was the traffic. 15 miles can be 2 hours in LA.
There is no current funding to build in Indianapolis.
USOTC houses training facilities which are used more often by foreign teams than American, and the flight schedule into Colorado Springs is not ideal. It does have MAG and professionally-run dorms.
I don't know what happened to the bid north of Orlando. USA Golf and USA Tennis (?) train there and they had professional funding to support the bid, plus professionally run dorms.