1) I would assume if it is for sale, your contract would have an inspection clause, so no real risk2) For sheriff’s sales, yes, knock on the door.

He would go to the refrigerator, takes out a new water bottle, takes a sip, then leave it by a window, 30 minutes later, he comes back and takes another bottle, and at the end of the day, there would be six bottles of water still 90% full laying around in different places, two of them knocked over and spilled.Have you lent tools to someone you hired? 

Some want properties that need cosmetic fixes only, others are willing to knock it down.

Don't knock liberal arts education.

He knocked on the door and no one answered. 

He has over-delivered with every company he's been with in the past, BUT I am trying to brainstorm what other high value things he could do if I'm paying a salary...Ideas:     Manage construction projects for othersLead Gen for sellersDoor Knocking ForeclosuresIdeas, advice, and all is appreciated.

I'll be sure to update you after he is finished and hopefully it will be positive (currently knocking on wood)

But if it is something more serious, I would be knocking on doors and trying to have conversations and back it up with plain English written notification.

He knocked down a bad wall over a month ago and has left it fully exposed since. 

The kitchen was remodeled, new appliances, granite, knocked out part of LR wall for open-concept kitchen/LR, tore up carpeting throughout to reveal hardwood floors, installed LVP in 1) kitchen and 2) den-turned 4th BR, upgraded toilets, painted entire house including pine planks and paneling, and crown molding,  installed sliders to backyard.