This was a hack a painter friend gave me and has saved me a ton of time and money. 

They are asking for a professional painter to come make adjustments. 

Actually, my painter and tile contractor are licensed, and are required to be licensed in Arizona. 

I’m hoping to identify trustworthy, reasonably priced painters/installers prior to closing so I can hit the ground running asap.Does anyone in the Philly/Upper Darby area have any recommendations?

Just this week a painter asked for 50 percent upfront.  

My painter had a helper...nice guy, late 30's..."

They are willing to do it for less than I could hire, ore example, a painter to do the work, but I'm trying to determine a formula for easily coming up with fair payment terms.

Additionally, last year when their painter was here painting the kitchen walls after the new cabinets were installed, he put painter's tape on the sides of two of the cabinets in our kitchen and when he peeled it off, it took the finish right off of these two cabinets, making us think that they ordered much cheaper, much lower quality cabinets than what we had ordered and what they charged us for.

Nobody likes white except painters (job security) I use the colors: anew grey(light grey), olivewood (green/grey color), and a tan color that I colormatched years ago.

Thank you @David D Painter.