My quick math is about -200/month with 20% down and $1800 rent.   

I mean this is a 500k house, if my math checks out. 1% is still 5k (especially if it's an easy sell).

RE is just math!

I don't think I have an exact formula for this but its math I find myself crunching in my head a lot.

A "quick math" AirBNB analysis would have me just under breaking even on the mortgage after accounting for management, AirBNB fees, CapEx, vacancy, routine repairs and about 10% set aside for other STR related supplies.

In my view , the problem with indirect is problem with math.

Thanks, Ana ITS ALL about the math, thats it!! 

x 12 months: $7,488With Depreciation (lets take the 30 year, not worry about re-coup costs, and assume the value is all in the building and none in the land) ~3,333, add in the fact that you have a tax shelter (~$3,000) You've effectively made $15,000Pay off in 24 months: Now lets keep the math simple and pay off 1/2 of the remaining mortgage:  69,000 / 2 = $34,500 - $15,000 = -$19,000!

RE is NOTHING but math.

Its an easy math problem for those counting on 100 to 200 a month CF.