hey dude!
Paying up front is always risky, but on the other side there are a lot of schools require that. I called up the school you are talking about last year. They offered me the same deal. They are quite cheap though, but I never flew with them.
Try out skyventureinc in Arkansas.
Skyventure Aviation Inc.: Flight Training School. Call them and ask about renting the multi.
Or try out multi engine training in Arlington, Dallas. They have some old travel airs.
Good luck!