Currently it is filled with tons of junk from the Neighbor business including oil barrels, tons of broken items, and sheds that they use for storage.

We primarily use Schlage Encode's without issue on over 80 listings, however we have had some lemons. 

You'll pretty much know it WAS if the house was built in the 60s.Either way, we put 2 to 3 coats of oil-based polyurethane on the floor and lay something overtop, LVP is my go-to, and read that we wouldn't have any issues.

I would envision things would still be strong through the winter as supply decreases but demand is still existing - and this is with most of the oil rigs stacked up... wait till the price of oil comes back next summer.  

The Resident shall keep these areas free and clean of any vehicle fluids, such as oils, etc.

Run a well-oiled machine.

There are other factors like depreciation limiting your taxable income that affect your IRR, but apples to apples, I would rather own an oil pipeline ETF that has a solid yield of 6.8% and doesn't involve tenants and toilets. 

With oil up so much from its lows you have to think that will have a negative effect on earnings in a couple of months.

My floor guy sands to bare wood, stains, and applies 2 coats of oil based poly for $2.50/sq ft.

Have you considered either exchanging into a DST or selling and receiving the tax exemption and parking that capital in a gas and oil mineral rights fund?