One thing for sure, never let a tenant install their own window AC unit.

If not approved by your significant other than I would install a patio using pavers since its low the the ground with 1 or 2 steps to get there. 

Our friends installed them in the kitchen & baths during a major rehab & they are amazing.

Someone just posted a FB post about this same thing- He literally wants to lock the thermostats or install a digital one so he can keep from from setting it below 68 becuase "There is no valid reason for any one to set it below that temp ever"This is the kind of thing that makes people assume landlords only care about money and not humans. 

I shortened a window by, after framing for the right height, simply having the installer make a flashing fascia from the bottom of the actual window down to the sill.

The labor alone to manufacture your own flooring, who knows, I guess it depends on how good you are and if you have all the equipment and time.I just installed a oak solid wood prefinished floor for $2.25 a sq foot.I feel time is better spent looking for a closeout, or looking on craigs list until you find what you want.

I have a friends father that does work on the side and installed a top of the line buderous boiler in my house for a price you would not believe.

I will get on YouTube and see what I can come up with for installation videos.

But the appraisers mentioned in the improvements section that only new plumbing was going to be installed and only on the first floor.

Luckily I have security cameras installed so I can keep a new he only on thing, unfortunately it looks like they're dealing drugs.