Oh, managing my normal bank stuff and my investments in one place seems neat, I'll look into Schwab!
On another note, how "flexible" (not sure what the right terminology is) are these brokerage accounts? Is it like savings where you can withdraw when you want, or like a 401K where once the money goes in it's super hard to get it out?
They're flexible. Once you put in money the broker will give you margin. That lets you buy, sell, or send money out without having actual cash. They'll charge you for it and obviously you need to eventually settle the positions by putting cash where it's supposed to be.