Well that’s a lot less than a 265 as pictured! Maybe a little over-estimated but stuff ads up to fast.
Boat is 2900, engine around 500, full fuel around 500, hardtop 250?, water 50, anchors (2) and windlass/radar/livewell (on deck, not the fish box)/spare prop/tools/safety gear/10 rods+reels+tackle maybe 300, trailer 1300. That’s around 5800. I ballparked the trailer between what an Alu and steel trailer would be (since I have not bought a trailer yet, could be heavier or lighter). All that stuff is in the boat right now.
I guess could be up to 1000 lbs lighter with no fuel/water and unloaded gear, Alu trailer. So rough estimate between 5000 and 6000 works for me. Would buy/prep any tow vehicle for max weight scenario of trailer load plus passengers and personal gear, cooler, ice etc. plus a big safety margin.