I had a tenant tell me I needed to install an overhead light in the living room, where none as ever existed. 

If we go into recession, he is right to worry about the future of solar in the next year or two.For note investors, the same problems that existed before with non performing notes are still there.

I plan to use $100k of this loan to consolidate the existing note on the original building as they are in 1st position currently.

Once the renos are done if the problem still exists, I'd talk to a trusted realtor and see what they think. 

Does anyone recommend gluing a custom tub surround to the existing tile walls?

Create new relationships and continue to build on the existing ones.Now that you're transitioning to sales, I recommend calling warm/hot leads daily - FSBO, Expired, and buyer leads.Fsbos can be found on ZillowExpired on RedX and other platformsBuyer leads can be found at: open houses; Zillow/Realtor,Trulia; Running targeted FB ads; OR partnering with a trusted lender to supply in-house leads or sponsor some of your online ad spend.Book suggestionsI'd recommend:EVERY BP book -https://www.biggerpockets.com/storeMillionaire Real Estate investor AND Millionaire Real Estate Agent by Gary Keller - very practical books.

I give a small discount to my existing buyer's list so they are always happy to do business with me again.

Just curious how you all are handling the various challenges that now exist with Corona, whether it is slower traffic, tenants struggling to pay rent, or whatever you've seen come up. 

Added a new build and created two from one building, out of the three preexisting single family homes: Completely updated and performed all maintenance from home inspections and discoveries as we constructed one new build, separated two existing, and completely remodeled another existing.

We don't expect him to prove his finances to us but at the same time, we don't want to be the "last to be paid" or not paid at all because we gave in too easily.Also, a lot of tenants who were due for renewals want to do month-to-month instead at their existing rates.