Curb painting (highest per-job rate; lowest startup cost)
Painting house numbers on the curb in front of homes is one of the few side hustles where the per-job rate is high and the skill bar is low. Stencils handle the precision — you just need a few practice runs to get a feel for the spray nozzle so the paint doesn't drip, then patience and consistency from there.
You set your own prices, choose your own neighborhoods, and customers pay through the booking platform before you arrive. No app algorithm, no boss, no minimum hours.