ok, let me get this straight. in every post you have done, you are concerned about the cost of the vehicle, yet you are looking at 21-30K miles on it? this is an easy one...

go for a 50K mile example, they are rock solid and if you find one that has been taken care of (ie all the FREE service was done on it) then you will be fine. if maintenance cost is a big issue, start DIY. otherwise find a good indie and pay.