Should I get 2 or 3?

Hello! My husband and I have been boxing in gyms and classes for over 2 years now and are looking for a fun game to do casually indoors as a workout when it’s too hot/cold outside and when we don’t book/have time to train.

Wanted to know if this game was worth it, and if we should get 2 or 3 as first timers? We have limited budgets when it comes to games so we were wondering about the differences between the two. Also, is there a two player mode? Thanks!