Hint, it's not going to get cheaper the longer you wait to make the jump, in a few years $23 million to the MAC will seem like chump change..
If and when the split from the p4 and the p6 takes place, the powers that be who will run the p6 level will figure out which teams not p4 takes football seriously and those schools who don't,, and right now the teams who are jumping from FCS and those staying FBS is evident to everyone which schools and fan bases take football seriously.
Wait and get forever left behind.