It’s your money. And if you want to move half to CDs or Treasury bills (see this article) then just have them send the money directly to your bank account and do your own “chicken money” investing. You certainly don’t have to pay for that.
As for your quarterly amount — you should pay no more than 1 percent annually — So you figure it out. Your fees will drop when you move to cash — and thats probably a good idea at your stage of life.