Keeping anything under the tramps is pretty much impossible. If you're in rough conditions they would just get destroyed.
As for the setup, the bigger Leopard's like the 45 or 47 are about 25' wide so you can even fish without riggers. Just rodholders mounted on the rails.
I have to figure out where to keep the tender. I'll need one in the Sea of Cortez to get into lots of places where even a cat won't be able to go, Mulege, for example. I also want it for making bait in the morning while the wife and kids are sleeping in.
There's a rental outfit in La Paz that has these boats available. I have to get down there and take one out for a week.
I'd love to talk to your pal about his experiences with these boats.