I have a shot at getting some 9c1 rims from the u-pull it yard. Problem is, they are still on the car with the tires. They want $7 for each rim, but I would also have to spring 15-20$ for each tire. My question is if it's easy or practical to remove the tire while there to save about $80. Once it is flat, is it pretty easy to pop off the rim? Any help is appreciated.