Unfortunately, getting the insurer to extend coverage beyond the bathroom may be an uphill battle.

Instead, shut off the water to the toilet and place a sign on the door "Art exhibit: Non-functioning bathroom."

.: Bathroom Floor at the rental property looks bad as attached.

One of the biggest challenges is keeping the bathroom as carefree as possible.

The idea is to convert a multi-family building into condos; but not in the traditional sense where you separate pre-existing apartments into their own condos; but in a way where you combine the common areas of all of the apartments in that whole building, and turn the individual rooms within those apartments into condos themselves; thus transforming the hallways, kitchens, bathrooms, living rooms, dining rooms, porches, balconies into common areas of the condos. 

I'm a pretty handy guy but this would be outside of my realm, but my experience helps me understand how much this type of improvement should cost.Improvements: remodel kitchen and bathroom, paint interior, fix exterior scafolding.How should I go about finding a contractor?

Why do you put a window that low in the bathroom? 

First, you’ll want to bring in a licensed contractor or architect to check out the kitchen and bathroom.

Putting in a ramp, adding grab bars in bathroom, raising the sink height, etc.  

do you add bathrooms and convert the garage to rooms as well?