@Steve Babiak, you are a viable jackass that I just wasted keystroke on.............

I would highly discourage contacting them frequently if you don't have business to perform, as this could cause you to be ignored and labeled as a waste of time.

But, I wouldn't waste a lot of time on it. 

However you also will be letting all of that built up equity go to waste.

Your life is not worth wasting over this stuff. 

The lower units are usually accessible but for the upper units you may have to open up walls; hopefully just drywall and not plaster!

The short answer is "yes"...it'll work.Dumb newbie mistake: Don't hang the TV on the wall that is the headboard of the bed in the adjacent unit. 

Some say no way waste of money, some say yes, always, never own real estate w/o it)My opinion is yes, it is always best to own real estate in an corporate structure and to get insurance to cover yourself from liability.  

Remove 2 first floor walls with engineered headers and added a half bath on the first floor.

so dont chase a deal just to win it and end up losing any profit, don't waste time or energy dwelling on deals you missed.