Swim platform

I have bought a pipe bender so will start joining pieces of pipe together to make a heavy duty swim platform. The plan is to fit a 25 - 30hp outboard to it as a back-up engine & more importantly for the hours of trolling at low speed which the Perkins main engine doesn't like.... I have an idea how to store the outboard at deck level when not in use but i'll have to test this system as I have not seen it anywhere on the internet.

Been a while since I welded but it's like riding a bike ;-)