The truck's payload capacity (1/2 ton, etc.) has nothing to do with towing capacity. I recently researched a truck to tow my 3200 and it's confusing to figure out. The important specs are the GCWR and tongue weight.
GCWR is the max combined weight of truck+trailer+boat+all contents, including passengers. It varies even between different versions of the same model. You have to check the placard inside the driver door to be sure.
Once you have a truck with a high enough GCWR for your boat and trailer, you need to make sure your towing ball, mount, and receiver are up to the task. Those have limits as well.
I rented a GMC 3500HD from Enterprise for $150/day. So much less hassle than owning a big truck I would only use twice per year. If I win the lottery though, I'm buying one as a daily driver because it was amazing!
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1994 Maxum 3200 SCR w/5.7L Bravo IIs & 3kw Onan
2019 Starweld Victory 16 DC w/Suzuki 90hp
Dream boats (smallest to largest): Regal 38 Grande Coupe, Prestige 420S, Cruisers 46 Cantius, Princess V50, Sunseeker 100 Yacht, Mangusta Gransport 54