Just a heads up about tires.. I usually go to a relatively local place to me (Economy tires in Santa Ana). They sell "take offs" and used. Take offs are basically brand new tires that someone who buys a new rim/tire combo doesn't need/want.
As an example, my truck has factory 20" tires that go for about $225 EACH. I get 4 factory Goodyear tires mounted, balanced, and installed for like $200.
I'd look on Yelp or something similar for a "used tires" someplace local to wherever you live. Great deals to be had...