I really like this idea. It would be great for renters, too, if the services could be opted for a-la carte at a slightly higher rate. For instance, in Boston, I needed someone to help bring over an in-window air conditioner from a friend's apartment and install it properly in a window. I had to spend the better part of an hour vetting different Yelp-style contractor sites, several actual contractors, and calling a few to see whether they'd be interested, available, and affordable. Being able to tap a few buttons on an app that sits somewhere inbetween Uber and Yelp would be amazing.

That said, whatever site mediates this, would potentially need to have 24x7 customer service, a billing platform (with payouts), and potentially some decent liability insurance.