Is there anyway to get neutral players to lift or land with triggers?
None.
For all practical purposes, nope. Unless you count removing the building on the ground and re-creating it in the air
None.
We can't explain the universe, just describe it; and we don't know whether our theories are true, we just know they're not wrong. >Harald Lesch
Is there anyway to get neutral players to lift or land with triggers?
Its not even possible to trigger for human or computer players.
Are you sure there isn't a AI script that does this? I don't think that there is but I'm just saying.
None.