Being banned for RWT is the lowest chance of ban out there. I have only seen 2 people gotten banned for trading around 8bil+ at the same time. I have traded over 21 santas to another account and didn't get a ban plus had 3 accounts logged in at the same time on the same IP in the same world.
You shouldn't have any problem trading over to another account.
i have traded about 200m when i used to gold farm i know its not much but never been banned, and i have bought about 500Mish never been banned for buying ether