But make sure the colors are those that will be considered desirable to other tenants in the future.

I recently stayed at a STR with the nest thermostat and I think the Honeywell smart color thermostat is more of a guest friendly system.

Not only that, but they know exactly what we do in all our houses (from the paint colors we use to the finishes), so even if we didn't have someone managing them (and some days we don't because we're so busy), I'm confident they'll get the job done on-schedule and on-budget without any issues.

I knew that you was going to get creamed when you said that the only ones you could trust were appraisers and Inspector‘s.

As far as your particular scenario and investment please provide more color like down payment, appraised value, type of property, how long you plan to hold it, your credit score, your experience etc….this type of info is necessary to give you a good idea as to what would make the most sense in your scenario.

That is the "icing" as you said...with cherries on top...and whip cream while you're at it. 

[4] Will you use different window mullens, doors, trim and main colors to differentiate the homes, vs. all one type?

This should answer your questions plus provide additional color for you as you start learning this market.

Our local wholesaler is a one email solution...I request current availability of a size, type, color and general model to replace an existing unit from the person assigned our account, they send me the detailed specs and cost which includes delivery, remove and dispose of old unit, and any accessories needed such as range pigtail, 3 or 4 prong, or washer hoses, etc.

On the right side you will see the zoning colors.