Tribewanted: Vorovoro

I have a idea for a floating fishfarm in Ferro-Cement,
With air-sea power, able to have little energy ?
Inside hull : seawater for breeding fish
On deck : some living space
Maybe can grow to floating village ?

I’m able to make a small model,pict ?
Does anyone know’s how to (event?) start a project like this ?
Thanks, all info welcome
Ciao, Alain