I think that currently, individuals abuse the mechanic job for easy repairs. What I suggest is to limit each repair shop to 3 mechanics. The owner + 2 hired mechanics. This will limit the amount of mechanics on the server and also allow for more competition among all of the mechanics for things like upgrades and roadside repairs, by limiting the choices that people have for these things. As it currently sits most mechanics do not respond to roadside repairs nor tow requests.