Paul,
I missed your request completely, so this reply may seem awfully late. I had Kay's illness, then our trip to Spain, then more treatments during this timeframe.
First, I would recommend spending hours looking at fishing boat on the web, or going down to a fishing harbor with a camera. This will tell you about the different configurations, the paint schemes, and the masts and rigging possibilities. You'll also see they come in all sizes.
For posts and booms, I use telescoping brass or copper tubing, various diameter plastic rods, even the tails of cheap Hobby Lobby paintbrushes--use once for messy jobs, then chop off the heads and use again as a mast.
Many ships use side booms so the nets will extend quite far on both sides. Some still use sails as auxilliary trolling power.
Apart from the transoms, most fishing boat have rather substantial bulwarks, usually taller at the bow. I use my own brass railings and stairways. For rigging I use the finest nylon thread I can find--I think it's called 07,1/2--and florists tuule for netting. Today's boats usually have lots of worklights--they are available from 3D printers.
For me, it was research and read, so I could understand what each type of boat wanted to do and how it did it. I do think anything at 60' or under will be taken over by 3D printing, so I'll be going for the larger boats. Some of your boats look a bit infeasible or with proportions that are a little off--but you can see just about anything in a boatyard!
