In that case, the teacher/admin problem is solved.
Still, talk to 3132 for some advice.
My advice would be to start with FTC or VRC to build a knowledge base and interest, potentially at a significant cost reduction from FRC, and work towards an FRC team in the background. Say, a field trip to one of the Australian regionals the first year, do an offseason build for Duel the next year, then do a full FRC season the third year or following onto the offseason build.
FRC is “the show”: the robots are bigger, the events are bigger, but it’s more expensive. Starting at a slightly lower level can be a good way to make the transition easier–FRC2753 is the prime example here (FTC to FRC, then went back a couple years later).