As others have said, the IB platform is useful for <15 friends and family accounts. I do this for a few of my friends, but mostly my own kids. I limit the accounts to around 5k and concentrate on odd lot tenders and the like. The accounts do well percentage-wise, but on a small base.
I'd have to agree with the prevailing sentiment, however...
What I have found over the years: managing money for others changes the process - like the Heisenberg uncertainty principle - the mere act of observing an event, changes the event. The feelings and emotional process of managing OPM is totally different than trading your own portfolio. As such, I heartily recommend going through the process in a small way to try it out before jumping into or considering full time money management.