Any experience in using a Margin Account?

[Colton Hamilton]

I’m fairly new to the real estate game and I am looking for creative ways to finance deals. I have my father-in-law and his wife interested in investing. They are the people who have a lot of investment worth but not liquid funds. I came across the idea of having them setup a margin account from a friend who has one. Before I make the suggestion I was wondering if anyone here has taken this path and what their experience/advice is as far as a margin account.

Thanks!