/diy/ - Do It Yourself

My friends and I have been drawing up plans for the past few months on a homemade pontoon boat. The plan is to make two 8x4 ft sections (the dimensions of the truck beds well be using to transport) that we will secure together upon arrival of our launch site. Our main questions/concerns are 1. How many drums do we need to support the weight of the vessel/occupants 2. How to turn a bicycle into a water wheel for power 3.How to steer it besides having two people with oars sit on the sides of the bike. Any suggestions or similar plans appreciated