Congratulations, you've figured out the effect of compound interest.  

It's just a way to utilize any equity to compound the investment opportunities.I think that it's a great strategy, but ensure that you are being fairly conservative.

These are not compounded exponentially like a growth fund.

I'm in Broken Bow Nebraska 

Another great read that is not directly toward time utilization is "The Compound Effect" by Darren Hardy.

Actually, in your example you're investing $300K ($30K across 10 deals), if those average 15% annual return then you're looking at doubling your money to $600K at the end of 5 years (assuming your money is re-invested for compounding).

I'm getting estimates to fixed bowed Wall and the companies suggest different methods.  

Flipping is great too ... so profitable in fact that I flip everything I buy, it is just that most times I flip it to the rental market instead of the sales market, that way I get the short term forced appreciation AND the long term market appreciation AND the long term cash flow from rent increases, all compounding with leverage nearly tax free ... it's a beautiful thing when done correctly.

I have a one year emergency fund put away already in a liquid online savings account earning 1% and compounding.

I bowed out gracefully because my reputation is important to me.