Backed by the concept that no deal is perfect and that I'll be bale to find something wrong with any deal he sends ( we've been hunting for deals for only a few days). 

This concept doesn’t necessarily mean invest only in real estate.The timing of your early years of retirement will define your later years of retirement, which may be dependent on the markets and overall economy.Whether or not the 4% rule will actually work is largely dependent on a concept called Sequence of Returns.

Are you comfortable with the concept of being in debt or not?

Two things I would share: 1) find a local REIA club by going to biggerpockets.com/meetup and start attending it to meet people, learn, etc. 2) Study the concept of House Hacking. imo this is the easiest way to begin.

I’m assuming you did a thorough analysis of the areas crime rate and median household income etc??

I’m ok in concept with accepting discounted rent for 3 years to get a good deal on a house.

From https://www.nachi.org/ozone-generator-hazards.htmHealth ConsiderationsUnfortunately, the same chemical properties that allow ozone to alter organic material in household air also give it the ability to react with organic material inside the human body.

I understand that appreciation does not exist in this area  and have a rough concept of the clientele, but curious to your actual experience if you've owned here.  

My facility is located in the middle of a residential area (rezoned residential lots) and I have nowhere near enough units to keep up with demand, but I know the facilities on the outskirts of town, which although they are mostly still full, have a harder time doing so and often have lower prices.I'd imagine in the bigger cities maybe the smaller units are in higher demand due to renters storing more household items and less vehicles, boats and other toys, but maybe someone that owns a facility in a bigger city can comment on that.The one thing I really dislike about my facility is that there is no additional land build more units, so when purchasing an existing facility keep that in mind.

You get to immediately expense the residual value of the improvement because it is gone.Depreciation is a TAX concept with no relationship to real world.