You help one neighbour with their car and it snowballs.

yes; but I charge cash.
to all but my family. I have three married with children kids plus their; parade of cars, recreational vehicles, lawnNgarden equipment, carpentry, electrical, plumbing, drywall repairs, painting, renos, appliance repair, bicycles; you name it....
Then, when I can fit them in, neighbors and friends.
I recently turned 71; retired for, going on 1 year now. Busy, busy, busy.