Don't get fooled by the PR angle of "public safety", requirements are minimal other than providing established business with regulatory capture.Given the real incentive you see why cities will play ball with AirBnB but not Uber.

Denver street / grafitti / mural artist or community group to paint the side of my building (great exposure for their work, 50,000 cars/day)2. electrostatic painter or auto body worker who wants to moonlight and restore my metal cabinets lowrider style (think glossy turquoise or black with pin strips)

Any legal/regulatory barriers?

They don't have a dishonest bone in their body.

My friend is staying in Italy to bring back his father's body once it is released by the police. 

When standards eliminate both disabled and able bodied persons there can legally be no violation of the law.Your moral outrage and righteous indignation is misplaced.PS. if you are suggesting that a disabled vet is somehow different from any other disabled person that would be discrimination.  

that is not a lease option, that is a financed sale in the eyes of the regulatory agency's.

That's how you read body language, negotiate, and get a better price. #2 $12k for the entire kitchen or just cabinets and countertops?

I don't have a problem with reasonable protections for tenants from slumlords but those should always be arbitrated by either a court, or maybe an extrajudicial body to free up the courts and hear issues. 

Be productive to stay sharp and to maintain your body.