100 months.
Your brokerage account does not count. It usually goes without fail when you need that money the most it's usually at the exact wrong time. Maybe your holdings got shredded over night, maybe it triggers a major tax burden, maybe it causes you to miss a once in a lifetime opportunity.
A solid financial plan is built with a brick foundation (cash money). If you lay a glass foundation (stocks & stock options), all it takes is a few tremors before the whole thing collapses.