Is he going to carry crush washers for drain plugs like he/she should?
Will he/she be bonded and insured?
I'll give you an example why to be bonded and insured. My parents have two homes and pay to have the grass cut while away from whatever home.
The lawn guy ran into the AC condenser and ruined it at my parents summer home. The lawn guy called my dad up, explained what happened
and used his policy to cover it. An oil change mishap on a newer vehicle can cost $10K easily.