I guess I should have put some real examples in there to justify my numbers. But based on where I'm at, the 80k for a house is what I'm paying and I'm getting rents of $1,300 to 1,400 a month depending on the area.
So when I say 850 to 900 a month cash flow, that is including the maintenance ($50 to 75 a month depending on the age of the property).
Here are my last 3 houses I bought in Illinois:
Lansing - Rent $1,350, mortg 400/mo, taxes 350/mo, ins 75/mo, repairs $75/mo = 900 month total. Add some vacancy in there as well but I'm still getting 400/mo. This was bought with a hard money loan and refi'd (rate and term) into a conventional loan (5-10 financing) so I had no money out of pocket.
Lynwood - Rent $1,400 (mortg 440, taxes 380/mo, ins 80/mo, repairs $75/mo = 975/mo). Also bought with a hard money loan and refid into conventional loan (5-10 financing) with no money out of pocket.
Crete - Rent $1,400 mo, a little over 1,000 in PITI and repairs.
So the net cash flow with a mortg is about $400 a month. $350 if you add vacancy factor although I haven't had any turnover in any one of them because I'm actually under market on my rents - at least for Crete and Lynwood.
So my actual net cash flow on these 3 properties is $400 a month or so. If I didn't have mortgages, though, it would be between $800 and 900 a month of actual net cash flow - albeit you really would have a mortg on it because you'd be paying $350 a month on the 80k you're pulling out of your primary residence.
Bottom line is that its well worth pulling that money out as you'd be netting anywhere from $450 to 550 per month. But I guess I should clarify that with - depending on where you live. :-)