Actually, the reason to do it yourself is because they will wreck the wheel. Last year I posted that I broke my leg breaking down a tire ! sounds crazy, I have done hundreds, its not a new thing for me, but it happened. I am out in the country, we have equipment to survive. I can carefully break the bead using the forks on my skid steer. no damage to the rim, move around to different spots, you will win eventually on most car wheels. The kid at the tire shop will keep trying over and over to get the machine to break the bead until he bends the rim. When I used to play with WW2 trucks was when I created the chain saw method. Car wheels usually dont need such violence, but my method works with zero damage to the wheel. When I broke my leg, they were 6 ply 1951 dated hard as a rock jeep tires. I was a good boy and had soapy water on them for lube, and had no trouble breaking the bead with the skid steer forks. The problem came when trying to get the tire off the rim. The 1951 tires were so hard I had to put a piece of pipe on the tire iron , and even then could hardly get the hard tire to move over the rim. I did two, and the third one would not ease out of the rim a little at a time like usual, instead it shot out all at once, my leg that was pushing as I leaned on the tire iron then shot thru the tire causing me to loose my balance and fall on the other leg and then as I bent the ankle past the detent point I heard the crack of bones.
Long story, but the point is....I had 3 done, broke my leg, so I took the last 2 to my local tire shop. Big time shop....lawn mower ot semi truck, they fix tires, used them for 30 years on my daily's.
They did not break the bead with the skid steer forks like me, and the machine would not break the bead, so they use an air chisel at several points around the rim to get the bead broke. These old jeep wheels did come with tubes in them, but they also have the safety bead on the rim so they could be run tubeless, which I planned to do.
So the fools left about 6 chisel gouges around the rim that I had to weld up and grind smooth to run tubeless, and the, I had told them to save the tubes, and throw out the bald 70 year old tires. Instead, They threw out the real rubber extra thick...looked like new...military grade tubes, and saved the bald rock hard tires for me. Broken leg or not....I change all my tires just like I have since I was a kid and too impatient to wait for the old man to get home from work to help..