How would you structure a portfolio for someone else?

[Maximilian Marck]

One of the reasons and motivations for the work I'm putting into real estate is helping a particular person retire. In essence, what I want to do is sit down with this person, say "sign here," and give them ownership and cashflow of the entire portfolio entirely passively.

• What legal structure would best accomplish this?
• What systematic components would be necessary to make it truly passive for this person, so that I could still "manage" the portfolio if decisions needed to be made? I'd also like to be able to add assets to it as time goes on.