I agree with @Greg Dickerson Self Storage is a great niche, but it isn't a pure RE play; it has RE aspects, but also traditional business aspects too, such as employees and marketing,  that aren't seen in more traditional RE investments. 

You took no action to gain that equity, it was pure luck with a crazy market and some of it may disappear.

Our touch screen locks ran out of batteries in the middle of stays multiple times.

The sump I installed had a 120v alarm with battery backup that required annual service performed by the company under the installation warranty.

Yes - you are a perfect example of someone who is a great fit for a non-QM loan - they are similar to conventional lenders but have various options for income/DTI besides pure W2 including looking at your assets, bank statements, etc.

@Bruce Runn160k was just a pure guess, I have no ide until get a bid.

Jeld Wen from Home depot is pure junk, in  case you were gonna ask.

Mine is battery powered, I set it myself for every guest and it has a backup key in a lock box. 

For this duplex we are looking at, if both sides are rented out, the pure cash flow is between $348 (worse case due to CapX, repairs, maintenance) and $1208 (best case).

Glen Carbon has a yearly inspection requirement (not a bad idea on its own) but the pass/fail decision is purely subjective and depends on the mood of the inspector.