I'm going with the 9/0 definitely now. The 14/0, like you said, is for the real big UN's h which rarely happens where I live. Im in southern NC - if I were in Florida, that's a different story. But NC doesn't have many large hammers, we have scalloped hammers. Biggest thing you'll see here is the occasional bull and maybe once or twice a year, tigers will come through. I don't even think that my tiagra is a 30 wide, I'm pretty sure it's smaller. I would check, but I'm out of town ATM. The rig is used by BlacktipH (shark fishijg guys in florida, seocnd most popular fishing channel on YT) for sharks up to 8 foot, so I should be fine there. Hook, I'll probably keep the 12/0 circles - eliminate those smaller fish from getting the bait, but still be able to get anything 4' plus. With everything that I'll need to buy, it will add up to $750. That's for a rod, reel, line, all the terminal tackle to make 10 rigs (plus plenty leftover stuff - swivels are the expensive part), crimpers, wire cutters, pliers, gloves, bolt cutters, a hammer, some conduit (for rod holder), some tail rope, and a fighting belt/harness.
Those prices are from Amazon, if I looked on eBay I probably find stuff a little cheaper.
Go to your local tackle shop they'll be able to point you in the right direction or at least someone who is a die hard shark fisherman in your area. I mean I've caught bonnenthead sharks in Charleston SC on light spinning tackle 12 lb mono steel leader 8/0 hook from the beach no problem. I know the serious guys down there use either Penn or Shimano 30-50W and I know the one week I was down they managed a 200lb+ sand tiger from the beach on these set ups.