., but what good will taking out 10% a month (100 = 1200/year) do for me?  

If there is an issue getting it cleaned can cost anywhere from $20K to over $100K.Business - You can always sell the business to someone else and get goodwill which will lower your cost. 

Seller financing in our area is as rare as a good Will Farrell movie and subject-2 deals that make sense are even harder to find.One of our rentals used to be my primary residence for around 5 years, so financing that was purely conventional.

Fixing a leaking faucet or toilet or changing out a broken ceiling fan would show goodwill in addition to keeping your new to you property in good order.

Be honest with them as most anyone good will verify what you tell them.  

The posts that indicate to get an unofficial appraisal from an RE agent is good advice and RE agent appraisal should be free (or worded better, provided in hopes of attaining good-will so that if you list your RE in the future you would consider listing it with them). 

The agent gets double commission and good will with his repeat buyer.

I could open up my own shop, but I do believe there is a good referral base here, as long as some goodwill in the community.

I had to teach myself from YouTube videos to mud drywall, sand, primer, paint, install vanities, Baseboards, sanding and finishing hardwood floors, installed new flooring throughout 2300 sq ft house after watching 7 minute video, learn the difference between 45° and 30°, and use Goodwill and Facebook marketplace to Furnish

Even if you don't sell it you will win good will with your buyer base.