Remote Device that monitors Noise Levels within the STR Unit and sends automated messages to Guests when Noise Levels exceed a certain threshold.

Check for warranties on any sump pumps or mechanical devices.

It cost me ~$275 for the device itself and added $25/mo. to my plan which came without a contract so I can cancel it between rehabs if I really want to.I'll try and remember to follow up on this post to let people know whether it works or not!

The plumber I used had a listening device that can detect leaks when everything is shut off.

Things you may want to consider:Privacy fence in the backyardEnough parking in the driveway or street for the amount of guests you plan on sleepingInstalling a noise monitoring device (this is mandatory in all STR our brokerage manages) it lets us know if there is a noise problem BEFORE a neighbor complains. 

Drywall sanding devices are now far more trouble than they're worth for me.Then it's USG bluetop for the second coat, applied with a six-inch knife and six inch insider corner knife, and let dry.

Do you understand precious metals are dug out of the ground by what is essentially slave labor to build some of these devices?

A JV and an operating agreement really aren't all that dissimilar. 

It is the connections and devices.

They both may be viable alternatives for a buyer in that market area, hence they may both be comps.So, the appraiser may've used more similar comps in different zip codes, then dissimilar comps from the same zip code, but they may all be in the same market area.And if you are saying the same subdivision has properties in different zip codes, then it may well be that the comps in the same subdivision are more comparable than the comps in a different subdivision, irrespective of their zip codes.