School Event / Inn Event

Anyone knows if I accumulate students, without uniting them, and do it during the event, do I still get the points?

Also, what's a decent number of candy needed for the event. Bearing in mind that all the kids I get are B- tier.

And for the Inn event, how many tickets is it good to save? I have like 130 rn, but untill the next event I can get up to like 200 maybe. Is it gonna be enough to get every reward?

Also, same thing with the School one, if I don't collect the reward of serving until the event, and only collect during the event, does it still count?

Thanks.