If he is a seasoned REI he may be more willing to entertain seller financing but you have to understand what his concerns would be and how you could alleviate them.  

I also believe that communication could have alleviated any and all of these issues. 

However, the sub-2 doesn't alleviate the debt from the owner's credit report. 

I've written much about this on my blog, but you don't want to be in violation of federal law.There are 2 agencies that create regulation regarding these animals:The Americans with Disabilities Act (ADA)The Fair Housing Act (FHA)For emotional support animals, you may request documentation from a physician, psychiatrist, social worker or other mental health professional that the animal provides emotional support that alleviates one or more of the identified symptoms or effects of an existing disability.It does not need to be on a specific form.

Having a creative lender on your team can help alleviate this by pre qualifying the buyers and structuring the financing to ensure that both buyer and seller can come to an agreement even prior to the potential appraisal issue.For instance if you were listing your property for 300k and the buyer was originally coming in at 20% down payment($60,000) because they wanted to get rid of mortgage insurance and your appraisal came in at 285,000, the buyer did not have 20% of 285,000 ($57,000 down) and the difference of $15,000 extra cash to pay your price of 300,000.

To try to avoid pulling the pin and dropping a grenade on your post here's something I think might alleviate the rent concern:I heard a technique somewhere, probably from @Brandon Turner, on one of the podcasts about using a phantom craigslist ad to test the waters.  

You will want to get your cash back ASAP, so this should help alleviate a home just sitting on the market.

I am going to sell my car to try to alleviate that cost, but until it sells I will jump back in the Lyft game, thank you for the reminder.

I do not think I will do full remodels on kitchens and bathrooms.. more like upgrades. luckily the house is small.. and the floors , if I cannot refinish all of them, I might add LVP on top instead to protect them and alleviate cost.

A well planned lease and excellent property management company can help alleviate some of those maintenance woes.