I want to make either a scale 688I, seawolf or trafalgar class, roughly 3-5ft long, now I know sheerline model submarines make a kit, but what else do I need to get hold of

I fly R/C helicopters, so know quite a bit about r/c, but I'm new to subs, and want to get into it, if someone could list the things I will need and a rough price it would be helpful

thanks.