And, of course, I am never around because I travel a lot for business.  

I expect my rental income to cover mortgage payments of course, but I can also cover things as needed by pulling out or borrowing against my stock investments - so losing my active income source isn't a huge concern for me.

Yes my friend you "provided" the AC unit ....at least that's what the tenant will rightfully say.....and when it needs continous repairs.....somehow the tenant will seem to think you are responsible.And let's remember if the tenant hurts them selves while installing the unit, .....that you provided.....on your property.....or.......somehow they cause an electrical short......you know who will be held responsible.She of course may tell you verbally she only wants to fix the unit and not use it....but if she won't use it, why is she fixing it up?   

Charged for turn on (of course) which is handled by the original company that still has the contract to do this. 

Of course the property has to be a good deal sorry forgot to mention that.Assumptions:-Property cash flows from moment bought-Will force appreciation through minor rehabFollow up question:I thought if we had a property fully paid off, that has a higher risk since I will be targeted more?

I did click vinyl in one unit and it’s still great in year 7 but last 3 years it’s all reinforced friction fit (or glued, The point is not click-lock). ... and that’s all in pet friendly (including dogs) units.

:)Personally I am a big believer that you decide where you would like to live, and then do real estate, the markets will change drastically over the course of your career. 

I could probably fit about 6-10 desks in a particular location I am interested in.I have not reached out to the owner to find out if this is ok to do, I simply do not need the space but wouldn't mind renting out extra desks to others which would also happen to be in the same field as me.Am I even allowed to do this?

Of course, the potential for appreciation is 4% easily a year or even 10% in these areas but again the numbers show a market that is not rooted in reality.

I typically have to contact him 2-3 over the course of 10 days to get something fixed.