Details here-https://www.biggerpockets.com/renewsblog/2015/12/0...For rental properties at least.

Are they some sort of magical unicorns who speak planning and contractor-ese and will provide a detailed, specific, and GOOD plan?

Buy a book on estimating construction costs (they are readily available, and updated yearly)  Build a detailed scope of work. 

Here’s a link to details: http://www.loopnet.com/Listing/815-9th-Ave-SE-Rochester-MN/8804533/.

There is an update to be had at the end here, but i wanted to address a few responses first.

This information was helpful and I am looking into the details surrounding the refi.

Improperly uploaded my image in the original post - here is the detailed analysis!

You might have noticed that people that have been successful with rental units in  houses have to own about 20 or 30 of them just to cover their monthly bills, then they might get some of the profit when they own 30 or 40 all at different addresses.With apartment complexes you might just have one address where you have many units. 

Ask @Scott Smith for details on this and how this operation is called.

If anyone else is interested, comment below and I'll send over the details.