Most people here are cheap. Yes, they would hire the low bid guy. I deal with this a decent amount as a GC. That's my frustration ITT. People want A level service at an F price. It doesn't work that way. As I have said like 5 times ITT. If that neighbor got a bid from an EPA certified contractor who knew how much he had to do to remove all that lead paint safely and properly, the guy would never have hired them. Tens of thousands of dollars that would cost.
You need to lay plastic, wet all the paint, dress all the guys up in PPE. make sure no paint chips go anywhere on the grass, have poles with plastic in place to prevent it from possibly blowing places, vacuum all your material afterwards...the amount of time you would spend just on prep alone its insane...the circus you have to perform to be compliant makes the job dead on arrival. I sat through a 6 hour class on this and decided I wanted no part of it because of the risk involved.
I am all for being safe so I don't want this misconstrued but the EPAs guidelines are putting people out of business in the name of safety. If you opened up a painting business and tried to win business doing this you would go under and quickly.