Most stores require 3-4 days of availability including weekends. The shifts are usually 4-5 hour shifts. This would be the very minimum during the holiday season. As for tickets for your family members, you would have to be perm/part time to get the one day free hoppers (2), twice a year. Those are the only tickets you could use for your family. The CM is the only one that gets in on their ID (free). Unless you are management and have a silver pass, then your spouse and dependents can use that also.
It is definitely a job harder than it looks and requires some commitment to the training involved. It's not something that you'd work two weeks for, get some benefits, then leave. The small discount on park tickets is no way worth all that. That said, it can also be a really fun job!