The money is there. How do I use it?

[David Mathews]

I hope this isn't too goofy of a question but here goes... My strategy/situation: First a quick background. I'm currently investing in buy and hold using the BRRRR method. I'm on my 3rd SFR & it should be ready to rent in a month or so. I've been very successful in finding, rehabbing, and forcing appreciation in the 3 that I have. Enough so that I've had friends & family approach me with money to invest. My Question: Can anyone give me a scenario or attempt to spell out for me how I would go about using private money for what I'm doing? I mean how do they get their ROI? Monthly? Interest only until I refi? How do I know how much to offer them to be fair and still be able to come ahead on my rehab? Also how do we make it legal and legit? I realize these are probably simple questions but other than what I read I've really never been around anyone who has ever done it. Ufortunately I've actually turned down offers from people that wanted me to use their money because I simply didn't know how. I've read and reread dozens of books on tge subject of what I'm doing and so far every time I've implemented advice from the books it has worked flawlessly. They talk a lot about finding & using private money but nothing about how to use it when you find it. Any assistance is greatly appreciated!