Private Money vs Bank Loan?

[Paul Sassin]

Hey Guys, 

Recently bought my first duplex.  I have been working on buying my next.  I CAN get another loan from the bank, I have the credit and funds, however I have been researching the possibility of using private money.  I have possibly investors lined up.  However I'm not exactly sure how the numbers work for myself and the investor,  

Here are my questions

1. Is it better to leverage private money or bank?  Why?  Advantages and disadvantages?

2.   What should the investor expect in return? Is there a formula?

3.    Should the investor get ownership?

Thanks!!!!!!!!!!

Paul