You'd most likely have to look for a commercial unit, which would be more likely to have the card reading accessories you're talking about + they can keep up with the constant use, which residential units aren't designed for.

There is no secret sauce needed other than a really good budget, really good construction and really good design.

However, when I design my own house in the future, I plan to accomplish this in addition to other green energy features.

But those are nice cabins with more than one special factor: incredible views, high-end design, amenities.But I run numbers on potential short term rentals all day, and 4 out of 5 are less than 5% CoC.

We want to run another 203K, this time converting a basment to ADU (Basically have to do everything: Permit, design, Egresses, full kitchen build, level concrete floors) as well as spruce up the main level.  

He’s told me he’ll help my design the fix and flip to meet the latest market trends. 

I suppose if someone just had a traditional homeowners and umbrella policy there could be exclusions for rentals, but any decent agent can find a policy package designed for rentals.

We for example, are OK with "Cabin Style" under this brand-new definition - since this issues comes up frequently:Properties with “Cabin Design (Style)” per appraisalreport are eligible if Foundation Walls = Concrete Block Roof Surface = Metal or Shingles Heating = FWA Interior Walls = Drywall or Plaster

As far as a general STR strategy, a nice 3x2 house within an hour of a major attraction is not too much to manage and can drive a nice nightly rate if you go with high end design. 

Example: a listing with a cool property but bad pictures or poorly written Airbnb listing, or maybe it needs a new design refresh or doesn't get many reviews.