If you are running a business out of it and you use it as such on the ground level is anyone going to get mad and turn you in ?

@Robert AntonieIf you’re calling people selling their home they shouldn’t get mad at you..they should be expecting calls.

View reportJust learning how to use the calculator.The calculator is using the initial purchase price as the driver for the mortgage.My intention would be to buy it and rehab it, so I'd want the mortgage to be driven off of the ARV number.Anyway of doing that on this calculator?

Usually, just their ID such as a drivers license. 

Ex; drivers license, dob, etc..

So what we do have is their driver's licenses and SSNs for all 4, one employer (military base), cell numbers for 3 of the tenants as well as a number to a new business the step father started (I saw the number on his car; no actual location or address exists for this new business that they likely operate from their mobile).Thank you for the suggestion on the collection service and for all your feedback. 

Thus he’s more in the drivers seat re non price terms 

However have heard of people switching their driver license over, locking one of the bedrooms up, throwing some stuff in it and claiming they are occupying the place.

I dont care if you got the property for free, it must work for numbers and with your buyer being mad about 10K fee then they probably didn't run their numbers

It is a economic driver meant to ease influx of investments.