I was able to set up the account on etrade and hire a third party administrator to do the actuarial work. This plan works extremely well for a mustachian small business or sole prop that makes a profit that is sufficient to offset the ongoing third party actuarial administration cost.
If you are saving 50%-90% of your income, it can allow you to stash a significant amount of your income into retirement and defer taxes to the future when your income will be much lower.
If anyone is curious about more details, ask away. I understand that this plan is only going to work for certain situations, but if your situation is right, it could be the best option for anyone within the mustachian community.