Read the install guide for the flooring product you're considering for specific information on flatness, patching, etc.I'd break free any loose pieces with a scraper or similar and fill in the floor.

In the 2 years I've owned the properties, the only remodel work done was to install laminate flooring in high traffic areas - such as the living room and hallways of both units. 

You can get new windows installed (labor and materials) for around $250 - $300 per window.

You might be able to install a charcoal filter hood.  

There was no furniture whatsoever, so I have now constructed and installed the kitchen and apartment furniture.

Tomorrow we'll be working on prepping old used upper cabinets to install in a rental we're refurbing.

I had to beg to get him to install a couple of fixtures and would have been better off firing him and hiring someone else because he was chasing that next check to pay TODAYS bills even though he still was supposed to do yesterday’s work.

You should be finishing your house out with amenities that are comparable to the neighborhood (houses have granite countertops then you install granite countertops, etc.).

We had just over $25k in each of them by the time I had them moved, blocked/underpinned, installed septic, water, etc.

You install them on the cold feed to the water heater.