You have the live in manager at $700/mo but extrapolating out for the 12 other units should give you more gross rents than you have listed.

However I have a fully rented triplex I recently bought for 28k and didn't put any work into it, it has gross income of nearly 17k/yr and a NOI of a little almost 10k/yr So it's a pretty good deal for cash flow.

As for expenses, since I don't have real numbers I just used 30% of Gross Income. 

My goal , and I know its a lofty one, is to generate $1000 in gross rent for every $100,000 i invest.

Your total expenses should be around 50% of the gross rent not included debt service.

Carys, We charge 10% of gross collected, and $350 for tenant procurement.

We have a little one bedroom condo we purchased for just under 150k, and it's been grossing about $3500/ month.  

ARV is around $140,000Proposed purchase price is $70,000Expected rehab is around $50,000Total gross rent is $2400/ month

This significantly increases the asking price because it brings the gross rent to around 145K year(Triple Net).

@Charles S.The 50 % Rule States: That 50% of gross scheduled income (GSI) goes out over time to cover expenses not including debt coverage.The 1%, 2% and the 50% rule is meant to act as a quick analysis tool, to insure the deal is actually deal.