Rotaaa has no idea what an event is. It schedules people against sites, teams and job roles, and most event companies model a venue or a production as one of those. There is no event object, no per-event budget and no show-by-show profit and loss — if that is the shape you need, it is worth knowing before you import your people rather than after.
There is no crewing marketplace. Rotaaa rosters the people you already have; it will not find you freelancers, and it does not hold tickets, licences or qualifications, because documents are not built and a rota that assumed a certificate was current would be worse than no rota at all.
There is no invoicing and no payroll. A timesheet line carries hours and no money, and what leaves the product is a spreadsheet for whatever you bill and pay from.