It would seem as if you have left out the bit where you drive fast cars and ride fast women.
I'm sure this is just an oversight though, and it will be included in part 2.
You would be stupid not to negotiate wholesale broking/clearing rates with who ever you choose to do business through and then skim a few cents/pence off the top when you pass on the costs to the traders. The prices you will be able to negotiate, assuming you can get some half decent volume...