I don't know if I fully understand this, so if I completely have missed the boat, I apologize in advance!
It sounds to me that your team thinks it should have two separate FRC teams now because you have another sponsor and more people joining the team.
If this is the case, my opinion is that you should maintain the one-team status. While starting another FRC would be fantastic, I think it is in the best interest of your team to stay together, at least for this year, until you get more funding and more people joining. Twenty-one students on a team is not going to cause too much pandemonium, as some teams have 40+ students. This would help the team pay for both the robot and competitions. If, by next year, the team has more sponsors and even more students joining, then by all means, go for making a new FRC team! FIRST is all about that. But your team should do what is in the best interest of the students.
I wish your team all the best with whatever you decide to do. Good luck!
