So what's your investment formula???

[Jason Gregory]

Hello,

I am a investor that has become a Realtor. I feel like I am very conservative when I run the numbers on a property. 

Example

A=$1200.00 Properties monthly income

B=$220.00 Monthly operating costs (property management, grass, and bug services)

C=$700.00 The total cost of mortgage; monthly with insurance

A-B-C=Gross monthly profit

or $1200-$220-$700=$280 of Gross monthly profit

$280*12 months= $3360 of Gross annual profit

Gross annual profit-1 month rent for cap X (A)= Estimated net profit

$3360-$1200=$2160 Annual net profit/Annual cash flow

$2160/12 months=$180 of Net monthly profit/monthly cash flow

OK, how is this equation similar or different from what other investors are using? I am interested because I work with a lot of investors, and it seems like everyone has their own calculations that they use. I am also interested in what is considered a good investment in terms of returns for you as an investor? I wish I had the ability to create a poll on here so I could create a better understanding of what investors really want. Because everyone says, they want 10%+ return, but what are you really comfortable with? Thank you for your time, those who are still reading.