In my experience if numbers work for a flip they should work pretty well for a BRRRR since it is basically the same concept. 

As an investor it's important to understand the concept and realize what each number is telling you (purchase price, rental income, property taxes, etc.).

While I agree that the concept of buying subject to an existing mortgage (or just "sub2") is straightforward, I can tell you from 20+ years of experience that the execution of these transactions is often anything but!

You can still accomplish the same concept by telling them you have a money partner you have to run evrything by.

It takes up no space inside the home, you don't have to worry about leaks causing damage inside, gas venting is much simpler, condensation drainage is not an issue, its quieter, easier to install when you need to replace. 

@Stephen BrownYou've got the concept down pat. 

Thanks as well for the tips on management once I get in there—assuming the identity of a landlord, pretty much instantly, is such a foreign concept but one that clearly has very real repercussions that need to get addressed, and timely so.

That's how you use leverage in real estate investing.It would probably help to read a book on real estate investing to better understand that concept, how to analyze and buy smart, how to finance purchases, how to manage tenants, etc.

It's a good concept, but no computer should be trusted to determine value because there are too many variables they can't see.

Hi all, agreed with the above that the general concept of "house-hacking" could be applied to commercial real estate where there is an owner-occupied business sharing space with other businesses or residential tenants (in the case of mixed-use).