What am I missing regarding land contracts and subject to's?

[Account Closed]

Ok I must be missing something because all these deals seem to have balloon payoffs at some point. No one wants to finance you forever especially if you're wrapping their loan. What do you do when you have exhausted the amount of bank loans you can get and a balloon payoff is coming due? I don't have this problem as I don't have this many mortgages (or any sub to's to be honest) but it does seem like there could be a difficulty down the road. Suggestions?