I got my real estate license in my late 20's, kept updated on continuing education, but only activated the license after all my kids started school. 

Is it specific to STRs or just a basic commercial policy?

And it often is not on the top of lists for parents to pass on to their kids anymore.

I'm not sure the premium vs the basic version (I only have premium) but for any property, I can itemize the purchase price, current value, tag the associated mortgage, my assumption on appreciation, its rental income, all of its expenses (including taxes, yearly mainteance, capex, insurance, HOA, property management, depreciation and other), its estimated sale timing/and fees. 

My only concern is that the introductory/basic plan has a 5 envelope limit - assuming this is a monthly limitation - and I may have 5+ applicants that are duds before landing on one that I am comfortable with based on screening criteria etc...

Last year we saw just shy of 14 million visitors.While I know just the basics of the cabin you were looking at, there are a lot of variables and things to factor in when looking not just at the cabin itself but pulling apart and dissecting those numbers to make certain it makes sense.

I'm not sure how to articulate it but, basically this bit of knowledge saves me a bunch of time and kind of surprised it hasn't come up in any of the books, articles, or videos I've been learning from.

Buying rentals for cash is VERY conservative and will take a long time to amass a decent portfolio.Leverage is how to grow your portfolio and wealth faster.Simple Comparison Example:1) Buy $100k property cash, it appreciates 5% in value annually => basically a 5% return on your investment ($5k/$100k).2) Buy $100k property with 20% down, mortgage rest.

ARE YOU KIDDING ME?! 

Basically it will tell you the demand, pretty cool tool.