FD gear is really cheap right now, you can get some excellent lenses for next to nothing. I picked up a mint 20-35 f3.5L for $200 and a 50 f1.2 for $30.

Going back to the OP, that's why I was suggesting something along those lines if you're the sort of person who has christmas pics at the start and end of the roll with summer vacation in the middle. Capital cost of the equipment is all that really matters, especially when the end goal is only a stack of 4x6" prints to put in an album.