What if you can't refinance due to appraisal, market conditions (interest rates, outside "black swan events" like COVID, etc.). 

@Chandler Williams plane ticket to Vegas and put the remaining on Black!

My husband is a general contractor and framer on Cape Cod.  

I’m mainly Class A and B areas and have properties in San Antonio TX and Cape Coral FL.

While container homes aren't necessarily on a black list for conventional or other traditional loan programs, homes that don't have acceptable appraisal comps effectively are.

am in the cleaning and restoration industry.ozone and chlorine dioxide and many other suggestions here might work but the most important thing is that you have to treat the source for it to work.A professional grade black light could have helped you find the source easier before your contractor painted and installed new flooring.If it is very strong odor  the proper way to do it is find source,treat,clean everything and then chlorine dioxide or ozone.

Meanwhile, my tenant tells me that every once in a while, a tiny bit of dirty black water backs up in the laundry area of the basement.

If I lend 30k for someone to close a REO deal then I'll have their car pledged, or have a co-signor that pledges the 30k if it is defaulted.a 2nd lien position with no protection is like going to Vegas and betting on black, only on that bet you win 30k, in a 2nd lien position what do you stand to make on a 30k short term loan? 

Quote from @Marie Black: Does anyone have experience with OfferMarket?

Because he can put $1million on black at the casino and still have $1 million left when he loses.