Using BRRRR Calculator with a Subject To Deal

[Matthew White]

I am looking for some guidance. I am currently needing a analyze a BRRRR deal that I am about to make an offer on. I am attempting to purchase the property as a Subject To. I plan on offering the current owner cash in their hand to allow me to take over the property subject to their current financing...

How would I accurately enter this information into the BP BRRRR Calculator to get an accurate analysis of the deal?

Any help would be GREATLY appreciated.