Welcome... I'm in Da' Burgh too.
1) No. Seadoo boats don't do well when leaving them in the water. First... the drive shaft seal leaks by design, so you may find your boat sunk if you leave it too long in the water, and not running. Also, even though your new boat has a "Closed loop Cooling system"... the exhaust is still cooled with lake water. In PA... we have razor clams, and they like to grow in the cooling lines. They will eventually plug up the cooling.
2) It depends on how much weight is in it. Sorry I can't give you a real answer on that one.