Originally Posted by
genejockey
That sounds INCREDIBLY inefficient. Not saying it won't happen, but let's say it takes the average wrench a couple minutes to true a wheel. Now add in the door-to-door time, which would probably be half an hour at least, what with finding the place, parking, walking to the house/apartment, etc. This would hugely reduce the amount of work each wrench could do in a day.
For the wrench, it's a tradeoff between that cost, and paying the rent. If they already own most of the commonplace tools, and a functioning vehicle, then at the very least their up front investment is minimal.
There's a person in my locale, don't know their name, but they do a thing where they spend all day at a fixed location, e.g., in a residential neighborhood, and just do tune-ups.