She gave me a poinsettia plant and a Christmas card every year and then one day I decided to sell and she got the listing. 

I just read about the Shell Cracker Plant. 

Had the place furnished like a posh pent house, lots of plants in front of the unit made the whole building look nicer.

A waterproof textured laminate is nice in common areas, and carpet bedrooms.

This keeps the uniform look, if you concrete on top of it you won't match the color and texture!

Imagining it’s going to be a neglected rental with some bean counting company doesn’t make you feel the house you lived in for however many years and took care of will be left in good hands...It’s one thing if someone takes out the garden and plants a tree but if you installed and maintained fixture after fixture, kept that place nice and tidy, the last thing you want is to imagine a bunch of random people running around and letting things around you rot to ****.

I am thinking about doing a rock garden, super low maintenance plants or mulch.  

They have been 95% full these last two yearsI've done upgrades such as a new shower in one unit, new deck on another, painted a deck on a another unit, new flooring in two units, planted flowers out front for curb appeal.

Have you thought about labeling individual bins for each resident and give then a rebate on rent to keep up garbage, plant a few big plants they get $15 discount a month and they add value to where they live.Save Money Clean Up Win Win for Everybody 

Not sure what the cost per square foot would be by the time you got all the texture, paint etc. done.Maybe worth looking into.https://youtu.be/GLjhrXFo0Kw