I know there is a lot of threads about installing but none that talk in depth about portable A/C units...Backstory: I purchased a 3 bed, 2 bath duplex in Baraboo, WI which rents for $995.

Then to finish the lots (installing roads, curbs, gutters, storm water drains) and bringing water and sewer to the lots can run $30-$40k per lot.

It has quickly turned out to be a nightmare, not only because of the water damage but also because of the property management company (notice, I said company – it is a large internationally known company).I spoke with the PM, their handyman, the tenant and a mold remediation company to put the pieces together.On April 16th all new appliances were installed.

Or they could just install a clothing rack and use the desk and shelves for storage.

Easy to install and last.

Scott mentioned, if you lack experience, get an inspection up front so you don't miss something and they can come back when you're done to ensure the buyer will be happy.....home warranties can be worth it in the retail market.Don't tie up money in materials to just sit there, buying an HVAC unit 3 months before it goes in isn't wise, order it, have the supplier hold it, pick up and pay before installation. 

Otherwise, maybe a gentle reminder that they're responsible for the lawn care - and maybe offer to install a timer so they don't have to think about it.  

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.

I do not install travertine in any rentals, however, I do install it in all my Flips.

Installation labor around 350/slab.