I have a managed account with a large brokerage house that does charge a yearly fee based on your balance. I believe they charge about .8% yearly. It has done very well. I actually mirror their moves with another account that I do not pay their fees on and it has done very well too. I get their advise on 1 account and use it on another account.
Of course both accounts have done well; the market doubled under Obama, and has gone up by 13 percent since Trump has been elected. How much better than the average has the managed account done? Over time, will the gain, if there is one, justify the amount you will give up factoring in the compounding interest you would recieve on your original investment if you never "donated" .8 percent. Most people who have managed accounts can't answer such questions. Can you? If you can, let's see some numbers in black-and-white.