If you need to have 'offsite' capital in order to be confident you can keep the account funded, you aren't really trading at 30 vol. You should calculate your vol on the full capital commitment, including the offsite money.
Trendfollowing at 30 vol is nuts anyway. You can assume a drawdown of 1- 2× your vol target at some point, and a loss of 30- 60% will cripple you. When you lose 50%, you need to make 100% to get back to even.
I've posted before: the prospective Sharpe of trendfollowing, ½- ¾ at best, isn't enough to support heavy leverage.