Trying to reach the $110k mark for IB's portfolio margin. Strategy is fully hedged (no directional risk) and would yield at least 50% return on capital in a year at 10x leverage, but around 100% at my target of 18x leverage which IB's risk calculator seems to allow with ample margin to spare. I already run this strategy in my account at about 2x and the IB margin is under 20%, but Reg T is the limiting factor and I'd like to scale it up more. Regular unsecured loans don't really go this high, so where would I borrow from at say 20% to fund the strategy? Or are there companies that do profit sharing that might put up the capital?