.$70K purchase, only needs about $10K in paint, molding, tile...simple stuff.

If you don't do work yourself, is labor to install categorized differently? 

., the roofers, the fireplace repair crew, and the carpet installers), there were numerous instances when Bildwise and its subcontractors did not complete tasks in a workmanlike manner.

There are things I know I will never look at doing myself: plumbing, electrical, roofing, installing hardwood flooring, bathroom remodel, and I'm sure many more! 

You may want to request the construction drawings / plans for the utilities that were installed to help better understand their impact to your property. 

I just designed and finished installing a 1314 sq foot home.

But comparing rates on commercial (non standardized mortgages) is like asking what’s the price of carpeting without specifying the quality, type, color, installation, warranty or anything else.  

What is the cost to have them installed?

I have verified with USPS that each triplex address is in their database and that there are no issues with the location and height that I would install it at.

Agree with everyone else - Install a nice pre-fab vanity, tasteful mirror, add a nice light fixture, and slap a coat of paint on the wall.