The Math for your Real Estate goals?

[Craig Moore]

Hi BP,

I'm wondering if you all can advise me on the proper way to set-up my goals and make sure the math makes sense. I had this figured out about a year ago (before I even had any capital), but have since forgot the method. Here's an example:

I'd like to have at least $10,000 a month in rental income. I would like to be a buy and hold investor. I believe I read somewhere that you should take your goal and divide it by $100 per door. Is this true? Would that mean I'm dividing $10k by $100 leaving me at 100 doors? So that is translatable to: 33 3-family houses, or 50 duplexes. Do I have this math correct? What are some other ways I could reach this $10k per month number? I'm giving myself a 6-8 year window.

Thanks for your help!