The comparable on Air BnB are few, but seem to be renting around $65-85/night.

Roof, windows, doors, furnace, hot water heater, concrete, etc.What research did you do on the neighborhood and probably tenant pool?

For MTRs I do not use air bnb. so no I have not.

I now have a ten-page agreement and it keeps me out of a lot of hot water. 

My goals so far are as follows:1) Set up 2 more LLCs under my WY holding company2) Be fully licensed for real estate in Idaho in addition to my Washington license 3) Add at least 7 new cash buyer investors to my hot deals network4) Source at least 2 good attorneys/ escrow LPOs to handle simultaneous wholesale closings and executory contracts 5) Networking with highly focused JV partners, as it makes sense.  

Our original strategy included St John as a lifestyle air bnb play while working remotely and living summer to summer.

There is plenty of room for rental growth in this area given its small size and the rental market is very hot and there’s little availability.

Depreciation can be applied not only to the property but also to fixtures, such as air conditioners, so if those fixtures are also new, the tax savings can be even greater.On the other hand, used property does not provide the same tax savings as new property because many years have passed since it was built, so it's useful life may be less, or in some cases, almost zero.

Is the market there hot? 

I remodeled her bathroom, upgraded her kitchen a little and added central air and other things.