Business plan for commercial loan (How?)

[Joshua Coppick]

Hi all, I'm a newbie at real estate investing and am looking to go into a 4-plex deal with another experienced investor. 
I called my local county based bank and they stated that because this was a multi-unit investment property, that they would prefer to finance it through a commercial loan as opposed to mortgage. In order to get the loan they are requesting a business plan. How could I learn about business plans for real estate? What needs put in there that differs from a business loan for a lemonade stand?

My partner has always bought his deals in cash, so he has no experience in this. I have contacted other banks they have said regular mortgage but if I get the price low enough it would have to be personal loan or Id pay in cash. 

-Thanks all.