Floating Dock/Pontoon/Cabin Hybrid. Please Help!?
So i have this idea for a vessel i would like to construct. First, imagine a 10' by 20' floating dock. It floats using steel or plastic drums arranged in a line and possibly attached to make two parallel pontoons. After the "dock" part is constructed, a 10' by 10' cube will be constructed on top, around 3/4 of the way back on the dock. The rest of the space in the front of the cabin will used for a mast and pirate-like (:)) steering assembly managing a rudder or two on the aft. Propulsion can be sorted later and may not even be necessary.
I would also like pointers on how and where to construct this and possible costs parameters. I am on a lake, Lake Cushman if you've heard of it, and have little dock space. The lake level will go down and provide an inclined beach where i can begin construction over the winter. The lake level will rise after winter, but it can be completed by then i believe.
Assume i have the cabin idea figured out, all i need advice on is the above stated. Thanks! Any advice is much appreciated!