um.. it could just be a vehicle. so you place the vehicle spawn where you want the elevator then select the elevator vehicle so you get on the elevator(but you don't just sit on it like a jeep) on the players touch it makes the player interact with the elevator and when your on the elevator and you press the up key to go up a level (which is goes up 2 bricks) and you can press down key to go down 6 bricks. but there still it one major problem, there might be another player at a different level and he wants to use the elevator, your solution is typing a message when near the elevator area, the player types /elevator to[level] and then the elevator comes. when the elevator reaches to top off the build, the elevator future looks the height and if the elevator would collide with the next 6 brick it would not go up but if it will not collide the elevator is able to do up the next 6 bricks.
p.s the idea was from me so your not allowed to say 'oh i was the one who made it' you have to include me in or else!
thank you!! lol