You take the estimated ARV (after repair value), multiply it by .70, then subtract the estimated repair amount.

I'll be using the techniques outlined in Carleton Sheets course to acquire properties for no money down that will still cashflow... and I suspect this will work well in my area since rentals with conventional financing can be acquired with a gross rent multiplier of 50-60.In 8-12 months I hope to have completed 3 rehabs, have $50k in capital, and 2-6 rental units which cashflow $100-250 each per month.

If you can flip too more contracts, again you'll multiply your money.

The easiest way to estimate without seeing a property is just use a set amount to multiply by the square footage.

Divide the two and convert to a percentage and then multiply that percentage by the your list count then multiply by the cost of each mail piece then divide into the cost of a new list.

When I ran my 30 minute TV infomercial it was my second highest lead source and always produced above my 12 times multiplier.

Multiply that by 100 business meals a year for a self employed person, and you get the idea.

However the "1% rule" is a form of gross rent  multiplier.

Gross Rent Multiplier?

You can also add the first and last ones together and divide by two to get the average and then multiply the average by 19 to get the total.