Typhoon sounds like a model name. What brand is the boat?
Is motor 2 or 4 stroke?
2 stroke is lighter, so less stress on the transom.
2 stroke 50hp mercury weights 200lb, hopefuly you wont have to put that on the boat every trip.
Are you going to ride the boat for 180mi to your home?
If so I'd be a little caution riding something that does not have any history with me.
Sounds like a nice set up. Post some pics now!