What if the job is not done properly? Or what if you have issues? No one you can call to come fix anything. Nothing is under warranty etc... Lots of headache sir
Happens with electricians/mechanics/gardeners/etc of all types, not just illegals
Lot of shitty American electricians out there as well that will try to scam you if everything isn't great, and can cost you $
Illegals a lot of the time actually do pretty high-quality work cuz they know their margin for error here is smaller. Just gotta find the right ones.
All my weekly garden maintenance is done by illegals (which are obviously more common in CA), and they are paid well. Pretty common here. There are shitty ones as well
Just gotta find the right people