I'm the painter for our properties and I can be standing there showing a rental with a dripping roller/paint brush in my hand and about half the folks under a certain age will ask "can we paint?"

The paint I compared it to was the light blue we rolled from Home Depot, which covered in one coat (same roller cover and paint brush actually, as it was leftover from my last flip).Just sharing my experience.

Eventually you will be able to work on your business and not in your business, every investor eventually puts down the paintbrush and outsources as much as they can, then you can spend your time looking for the next deal!

That's why you don't see anyone painting their car with a paint brush.

Buy him a paintbrush and see what happens.

Unfortunately, it's far too easy to pick up a paint brush and say that you're a painter by trade. 

You can get around that if you have a diy wife and kids that aren’t afraid to get their hands dirty and pick up a paint brush or swing a hammer 

I use the cheapest oil-based polyurethane I can get, Rust-oleum Park, and a three-inch white natural bristle paintbrush.

And get sheets of drywall and paint brushes in those kiddos' hands.

I quart of paint and a paint brush or a few cans of spray paint and something to mask off areas would be all that is needed.