I like your setup so far. What have you in mind for engine mount and location?
I am going to build one along the lines of a JAE rigger. That is my intention anyway.
A rigger built by Hooty on another forum, caught my eye. I will; be incorparating
a lot of different ideas from other builders. I will be using a small engine. I love airboats.
Not  fast ,just fun.
I will be watching your build

 
                  Having this much must be illegal
.