Private money questions.

[Frances Cue]

Hello! 

I have an opportunity to work with a couple of private lenders. I've never done this before and wondering how do you structure deals with private money? I am interested in getting a duplex and BRRRRing. When do the private lenders get paid back or what's a good time frame? How do I pay them back? and how much interest should I expect from them to ask? Also, if there's any resource/materials/books out there you can recommend,  that would be great. Would love to learn more before I make a pitch of any kind to the private money lenders.

Thanks!

- Frances