Which F-150 to buy??

I'm looking at retiring my 97 Mazda B4000 -- 5-speed, 4WD. Good truck but need a little more bed room and it's having more problems than I care to screw around with. Looking at a new F-150 -- or gently used. Want to spend the least amount of $$$ possible. Plan to drive the truck until I can't drive any longer (I'm 63 and in damn good shape).

Need some suggestions.

I see on the Ford website that the F-150 comes with V-6, V-8, or big ass Triton V-8. I am certain the V-6 or small V-8 is all I need.

I DO NOT tow boat, RV trailer, 3 yards of wet concrete, horse trailer, or a string of boxcars.

I DO tow:

-- 3-4 times a year a 5X10 utility trailer loaded with furniture;

-- 2-3 times a year an old VW Beetle, with a tow bar so it's on its own wheels;

-- 5X8 enclosed trailer with household stuff.

time, not all together:

-- big pile of 4X8 plywood or drywall

-- cooler full of beer and ice

-- 1-2 cu yds of mulch

-- cooler full of beer and ice

-- half pallet of bricks

-- 12-inch Dobsonian reflector telescope

-- cooler full of beer and ice

-- 15 80-lb sacks of Sakrete

-- Troy-Bilt Horse tiller

-- 1-2 cu yds topsoil

-- cooler full of beer and ice

-- John Deere lawn tractor

-- old black-and-tan coon hound

-- damn cat sometimes sleeps under the tool box and ends up riding around in the bed

-- misc carpentry, electrical, masonry, roofing tools including air compressor and nail guns

-- cooler full of beer and ice

My B4000 is 4WD and I need 4WD every now and then.

I'd like to have a little extra room behind the front seats but don't want the crew cab (too big, too many $$$). Need the 8-foot bed. Need power steering and brakes, A/C, CD player. Prefer 5-speed and manual

4WD but I guess I'll have to accept automatic. Don't need power windows, power seats, GPS, leather, any of that other shit.

Questions:

Is the V-6 sufficient for me??

Is it cheaper to have the dealer install frame-mounted hitch and bedliner, or, should I get aftermarket?

Thanks.