I picked up a set of used rims froma guy on the side of the road selling wheels and tires out of the back of his van. set of 4 chrome Ford rims that had some surface rust. sanded, primed and painted black, Grand total $45 for all. Check a junk yard, they always pull the rims that are worth selling.
Definitely look into wagon wheels. Those boogers are cheap, and tough as nails. Cost effective as welll. As I type this I'm thinking of where to get some cheap used ones. I cant think of anywhere, but the search is ON!
I'll get with you if I find some! Check out FS forums!