However, there are numerous ways to CREATE investments that have 15% or more cash flow AFTER repairs and allowance for cap ex.  

May be worth looking into both to compare features and pricing.

The best way to see if there is demand is to look on Zillow (there is a room feature) and Facebook Marketplace.

John is right about the enemy method, its the only accurate way to estimate revenue.The blanket estimated revenue amounts on analysis websites like AirDNA can be a decent baseline, but generally include too big a pool of properties to give a very precise estimate.The way I use the enemy method: Sign up for a pricing software that has market analysis (I use PriceLabs but most of the pricing softwares have this feature).

Here are a few suggestions on how you can maximize the wealth of information available: Check out the blogs and podcasts, or take advantage of the search feature (magnifying glass).

I've been using Michael Blank's Deal Analyzer which works fine but there are some features that aren't available.

You are right, these don't attract families, although there is a very successful group called Gateway Vacation Home Rentals that are featured on VRBO and other sites.

I'm in a few facebook groups with cabin owners in blue ridge and my neighborhood, and many are saying their bookings are way down year over year (some with no bookings at all), apparently due to the increase in short termrentals available.That being said, if you do buy something, I'd make sure it has some features that will set your cabin apart.

For better or worse, this feature is one of the ways that make DSCR Loans popular with investors since the qualification metrics are typically easier than other options4.

You need a property with unique features worthy of the investment, I.E attached garage or partial finished ____ so you're not starting from scratch.