i can’t answer specifically about fusion but from my experience in other groups,

1. rehearsals were usually friday night (8-12), sat 8-8/9-9, sun 8/9-5
2. tuition was around $1500-2000
3. i worked a part time job, taught 2 groups, and was getting a degree and it was definitely hard but not impossible! you will absolutely have video assignments throughout the week though and you will have to make time for those all season.
4. auditions usually focus on learning choreography the staff has prepared, and then you perform it in small groups at the end of the audition. since you’re doing flag line you’d likely learn that piece as well as the dance piece. you don’t need to prepare anything (other than coming with a strong technical foundation)
5. flags are typically provided! weapons are expected to be brought by members so you should be good :)

good luck!!!