Putting TP in the trash is the wrong response.If the plumbing is functional, then this is a tenant responsibility.

But where I see click funnels being a challenge is a robust website with interlinking pages.

I have to dive into the DP calculators, I've had my spreadsheets from previous looks at real estate, but I'm sure DP is much more robust.  

BRRRR, much like making money in general in real estate, requires certain conditions  for it to function.  

Cash flow, principal pay off and of course appreciation are all a function (percentage) of your portfolio value. 

I have helped dozens of people buy and sell functioning homes.

Some consumers have never liked it, but things still function perfectly normal in those states.

Basically look at potential failures and determine their impact.Use the lookup function on my name and What happens if you die?  

I'm an agent in Oklahoma and we have a Seller Finance addendum written up by the state real estate commission that functions just like an FHA or Conventional Loan addendum to a sales contract.This is, of course, standard when you purchase a home with bank financing.

I personally think it is a function of the market cycle, and real estate is where money is currently flowing.