Most trades workers don't need full-sized pickup trucks. They do need an 8 foot bed. An amazing number of full-sized pickups come with 6.5 foot beds by default, and cost extra for the 8 foot. They won't put 2 tons of gravel in there; they will put plywood sheets and lumber and power tools; boxes of nails and air compressors; the toolbox that they always want, the toolbox for this job, and the toolbox with backup tools that you lend to the guy who 'forgot' stuff. (Not the guy who 'loses' stuff.) None of that needs the big V8.
If you've got a 4 seat cab, you'll be asked to take a couple people out to the other site, but if you've got a 2 seater, maybe you don't get asked.
Four wheel drive and big wheels mean bad fuel economy. If you need them, there's something wrong because the mud is supposed to go on your boots, not your wheels. Your pickup is not an earthmover or a wrecker. One exception: if you've got a really big truck, you might get wintertime snow-plow jobs. They really aren't fun.
Source: neighbor is a contractor.