I googled this and found that they multiply x .80 of the fair market value then subtract repairs and realtor fees, etc.

Then, you have a formula multiplying the absolute location fo the refi/loan amount and the term minus the 'yield maintenance year' at the top. 

They like the buyers broker to handle that side so they can focus on the listings.The questions you are asking multiply that by thousands of other buyers asking the same thing.

If you think the value will likely be raised by 25% after you buy, I'd multiply the current rate by .25 to get in the ballpark #s. 

The earned finance charge is computed by multiplying the daily rate by the number of days the principal balance is outstanding."

If you multiply that by 24 months or 2 years, you're saving $5,418.96 so you'll recoup your money in about 20 months which is good.

First you have to figure out what the grm (gross rent multiplier) is for each market area.

So if cash is what you are looking for to purchase more RE, you need to know the equity of each property and multiply it by 65-70% minus current mortgages and that is what you can get out of each property minus closing costs.

I've been looking at the Bigger Pockets BRRRR calculator and I think the "gross rent multiplier" is being calculated incorrectly.

More specifically, at 20 units and they each rent for $1500/mo, that is $30,000 total monthly and multiplied by 12 equals $360,000/yr gross rent.