Tenant claims the smell is so bad the condo is "unlivable" - which seems a far stretch with three plumbers unable to smell even a slight odor.I can get another tenant easily, we had 12 showing in two days when this place went on the market for rent.If at this point the tenant calls again with another complaint, I'm going to give the green light for the property manager to let him out.

I see so many assumable loan which seems like deal, but I am unable to take it as my DTI is high due to primary property etc. 

In addition, the owner of the home must not own more than three single-family homes.3) They are unable to provide sufficient documentation, such as the emotional support animal letter, that verifies the ESA is necessary for their health and well-being.4) The tenant provides fraudulent documentation attesting to their need for an emotional support animal (usually a fake emotional support animal letter).5) The landlord can demonstrate that making accommodations for an ESA would impose undue financial burden or logistical burden. 6) The animal is destructive to the property or displays threatening behaviors that could put other tenants or yourself at risk.7) The size or nature of the animal makes it impossible to house safely or humanely.

I have heard on several separate occasions about the idea of “borrowing against an IRA” to build funds for investing, but am unable to find any more information about this when I search for it.

Ultimately you'll never know but the risk is that they go under during your 20-year term and are unable to pay your death benefit if something happens to you. 

I've been unable to find one online, home depot or lowes which would fit.

The max Uncle Sam allows is 50k if you haven't taken a TSP loan in the last year.I've seen both good and bad experiences with this but at the end of the day it's no different from any other type of loan, you are just your own bank in a sense.The downside or risk is that you lose your job, your property isn't cash flowing, are unable to pay back the loan, and your retirement account suffers since the loan essentially turns into a withdrawal.The upside or best case is you have the loan for less than a year, your BRRRR pays off the loan, and you pay yourself interest 5% interest.The opportunity cost is if the stock market goes up 20% and you were only paying yourself 5% interest you'll miss out on the excess returns. 

The plan was to rent the house out after repairs but I was unable to find another home to rent and was not able to finish repairs. 

I’ve even asked the insurance company and they are unable to go higher.

If you don't, then it smells like a bait-and-switch scheme.If the previous ad was priced too low, you could contact the applicant and explain that it was a mistake and you are unable to honor it.