Numbers that spell out a win-win for all parties can be shared on a cocktail napkin...

Initial Screening Method:Quick math is fine if it's disciplined—like back-of-the-napkin 1% rule or rent-to-price ratios—but I coach people to always follow up with a structured first-pass screen.

Usually they are looking at safe, sanitary, and secure items. 

Your tax bill is 4x bigger than seller's accurate T12 numbers.To summarize, the seller numbers are really only useful for a very back of the napkin analysis.

Also, would like to know if the 1 percent napkin rule is still a good rule of thumb into weeding out properties.

I highly recommend using a duvet with an insert vs a comforter, it’s much more sanitary.

"Contractors" working out of the back of their truck, writing estimates on napkins, taking 50% up front deposits.

We are riding from cap 9 market to cap 3 market, everyone in BP that invested in 2009 is rich enough lol.Now................ the difference is the effect of asset when financed with short term debt vs very long term debt.With very long term debt like residential we have reduced appreciation rate in different market (from -2 to 6% market)to a collapsed of valuation (in CRE using short-term floating) with (DE-)appreciation from -10 to -30%( one 100 bps changes in spread causing a decline of valuation to 10-15% and/or 10-15 DSCR from my napkin calculator ).

Just do napkin math and figure out what your max payment can be and then you can tell your loan officer what that max payment should be and they will do the math on the max loan amount. 

But I need to model it out more than just my napkin math.