Do a search on the SW board on jet props or boating the Yough (river). I know guys use those same set ups there too. There was a guy on here, something like Xtremeshallow or something like that. He posted a video of his rig that he uses on the Yough. Wicked fast & very cool fishing rig. I'm guessing pretty penny for it too. Search the NW boards on the same thing too, since that seems to be the standard in those parts too (upper right of the forums is the search).
My only experience on the type of river you are on, is from smaller boats or shore. I'd recommend a boat that you can stand up and move around on. Something like a bass boat, that is stable enough to move around. I have a smaller aluminum V, that you can stand only if you are extremely careful, but not really recommended. If someone else is in the boat, you need to let them know not to move... I also have a larger more stable boat (17' - sits way too deep for your application), but could jump up and down on the gunnels and likely not tip the boat. I stand and fish from it more than sit, which is a lot more comfortable, especially if you are using a lot.
Sounds like a fun property. Congrats.