From a funding standpoint, how does the 8 man differ from 11 man? Same equipment/supply costs, still have to pay coaches, refs,etc. I would assume most of these schools have a field of some sort inside of their track, but who knows what upgrades or updates are needed.
Logistically, I just don't see how schools that have made the choice not to play 11 man football for years can make the financial commitment for 8 man when it clearly hasn't been important to them. Remember, expressing interest is not the same as actually signing up and playing.