If you ever want your "friend" list to explode exponentially...buy a tire machine and balancer. They will be glad to bring their tires over to get mounted and balanced for free!
Yep, found that out - and it didn't take long for the word to spread around. Same with a welder, wood planer, cutting torches but the biggest one was after I got a tiller for the tractor - all of a sudden it seemed like half of town decided they needed a garden spot tilled.
I finally got to the point where I'd keep a few projects in a wait status until someone showed up wanting me to do something for them. I'd always tell them that I'd be happy to do it, but this or that needed doing first and if they'd help me with it, then we'd get to their job faster.
It was amazing how fast my "friend" list shortened.