I'm sorry. I honestly never played f2p much at higher levels, so I don't know where the good training spots are. Apparently Rogue Trader is a members-only mini-game. You probably have to pay market prices for your deaths and chaoses. That means you'll need a decent way of making money. Mining coal might be a good method. Iron can also sell for decent amounts if you've got lots.
Wish I could help you more
