In addition, you could add small canopy's to the top of the windows for aesthetics and also as a sun block.Through both you will get alignment of the windows, some vegetation or color from the flower beds, and added aesthetics for a relatively cost efficient price.I agree with @Gilbert that earth tones might work really well with this very low rise complex particularly since you're wanting to avoid installing grass.

The following are some property selection guidelines.Older properties require more maintenance than newer properties.Composition roofs require more maintenance than tile roofs.Properties in climates with hard freezes require more maintenance than properties in mild climates.Properties in locations with a lot of moisture require more maintenance than properties in dryer climates.Wood siding requires more maintenance than aluminum or stucco siding.Properties with lush vegetation require more maintenance than properties with little or no vegetation.Locations with high levels of termite activity will require more maintenance than areas with little or no termite activity.The tenant pool has a significant impact on your ongoing maintenance cost.

It’s like asking a kid if they want peas or broccoli or carrots, not asking if they want to eat vegetables.

"Eat more fruits and vegetables." 

., no pitbulls, one licensed vehicle on property, no noise, no alterations, no vegetable gardens, BBQ away from house, no pets, etc,.

Your best bet is to seal up & repair everything you can, keep vegetation away from the building, make sure there's no food around (like pet food or bird seed) & that the tenant keeps their place clean & food-free.

I love to garden (flowers and vegetables) and raising my own eggs and roasters sounded like a logical extension.

This isn't against any codes to my knowledge except it's hard to maintain the grass/vegetation around it which is a violation if it gets too high. 

In addition to the stalls, he also has 5 apt rental units on the property, a large barn that he rents to a contractor to store heavy equipment, horse trails, and he leases out a portion of the farm area to a local farmer who grows vegetable for "farm to table" restaurants.

Also, you should address mowing...frequency, height limits, and if necessary shrubs and bushes maintenance to keep vegetation away from the structure.#4, recommend leaving the system, but either stop the service or allow/require Tenant to subscribe.