1) I think it should be. Or possibly team pvp if there can be set up multiple entrances.
2) Dont believe you need a start kit. Though if they dont, giving them occasional items might be a good idea, if mobs are present. Problem is if items are dispensed by dispenser or chest, one play may take all of the items leaving none for the next person.
3) You already have my soul. It's in that tuperware in the very back of the fridge. Move the soda, then that scuzzy leftovers from two weeks ago. And there it is.
Redstone: Not good at it at all, but I am great at gathering materials and helping build otherthings. I can do redstone if I have time or a walkthrough. Eventually I will get it down pat.