So I just finished my purchase of aetherX tires and now need Wheels. I got an off the street quote from Discount Tires for Black Steel Type 42 Wheels @ $440 mounted. Is there a better way to have my cake and eat it too?

This gas thing is killing me @ 200 miles a tank full (used to be around 300). I would love to have my AT's in the garage ready to mount for my 4wheeling adventures and have the stock wheels on the remainder of the time so I don't have to break the bank to drive my truck.

Any ideas and help would be greatly appreciated!