Make bunny suits, respirators, gloves, goggles part of the process and make sure there is running water for cleaning on site.

Clean is my only stability!

To keep it all simple and clean I just want to pay him a set interest amount on the money he puts in the deal.  

Anyone can find a contractor and then have to deal with cleaning up the mess afterward.

It's completely clean.

Paid $1,000 for someone to come clean and haul everything off.

Sure enough, soon after they put a notice in everyone's mailbox, my relative saw some steps taken by some of the neighbors to clean up their lawn and spruce up their homes.

Be prepared to "waste" a lot of paper towels doing this, an irresponsible amount. 100% silicone caulk is extremely sticky and slimy, and you have to keep your finger clean as you work.

Did minor repairs inside and cleaned up the deferred maintenance on the yard using only about $5000 of our own money.

I dont think the tenants that are currently there could pay for a 30 to 35% rent increase so the choice would be to let them stay and raise the rent bit by bit or non-renew and have them move out so i can renovate, clean up and get market rent with new tenants.