I wouldn't bother putting in a lawn or do expensive landscaping because tenants cannot be relied on to water the grass or even trees and plants.

I have allowed some requests like I want to plant a garden or I need storage shelves but the sooner they start asking for changes to the structure the more likely they are high maintenence.You could also opt for a pm.

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.

Giving ordinary people homes in traditional housing developments that are advanced - green, clean, healthy, livable, walkable, integrated wtih the natural communities of non-humans (plants and animals).

There is also a stable blue collar work force with the refineries, chemical plants, and a port.

I didn't mention liability because I don't want to plant the seed in her mind.]2) Telling here about an upcoming plumbing improvement.

An electrical surge once in 2014 caused major damage at a previous employer's manufacturing plant when a single plugged in phone in the shop caused a fire.

I would plant some appropriate trees at the back of the property and do a french drain 

The best time to plant a tree was twenty years ago.