The acronym TEAM means Together, Everyone Achieves More. The key words to note here are "together" and "everyone". SFI is a team business. We all work together with other people for the growth of the business. The best time therefore to upgrade to team leader status is when you have a team under you to lead. Don't forget that maintaining team leader status every month is easier when you have an active team under you.
Good luck in your quest.
Hope it helps.