Quote from Don Bright:
My suggestion is chatting with a Clearing Firm first - they can help with a lot of this. Minimum capital varies from as little as $5million (I'm told) to around $25 million with bigger firms. Again, this is somewhat subjective, I suggest you call around. I haven't had to do this in quite some time, LOL.
All the best,
Don
ETC clearing, I believe has the lowest capital requirement.
Wedbush Morgan has the dead low commissions and overall best deals around for clearing firms, but they will not allow you to mark up commissions so this will not work for the broker/dealer model prop model.