BTW, if anybody ever had a moment of severe DIY determination, I have a method of safely breaking the bead on motorcycle wheels, with the typical garage inventory of junk, and if you can get the bead broken down you can unmount the old tire and mount the new tires by hand.
I have a couple of wide thick boards that I use to support the rim as broadly as possible under the point where I'm going to pull the tire off the rim. The wheel is at least as well supported as any wheel machine could do it, and the wood is as closer to being mar proof than anything in the tire shop.
I position the well supported rim and tire in a place near my car or truck wheel, I carefully put a board up on the tire to be removed, touching the rim, but for very sure not in a position to hang on it, and slowly drive the car tire/or/truck up the board and use the weight of the car to press down the tire until it pulls clear of the rim, or reposition everthing to repeat the attempt. I have broken the bead on everything from motorcycle tires to tractor tires to ATV to truck tire, and never damaged a rim.
Course, unless you're on a desert island, I can't say DIY mounting tires by hand is a real rewarding pass-time, that is unless you really hate having to have anything done at the dealership.