i would suggest just bypassing the 1/2 tons and go right to the 3/4 tons as your starting point. In most cases, a 3/4 ton can be driven off the lot for less money than a 1/2 ton. It is all about the market. Even if one doesn't get a lower cost for a 3/4 ton compared to a 1/2 ton, for the same price one gets a far more capable pickup truck in a 3/4 ton.
I know prices can seem high, but I never pay more than 80% of the MSRP, and usually less. That still leaves a considerable profit for the dealer. I have seen 2020 Chevy 2500 6.6L gassers with sticker prices of $49K selling for $40K. 401 HP / 464 torque, 14.5K tow rating and 3700 lb payload. There is no 1/2 ton that can compare in capability at any price. Try getting the maximum capable 2020 1/2 ton and driving it off the lot for $40K.
Similar comparisons can be made with the other brands.
Pickup trucks tend to be like computers. It is always best to get more capability than you think you need now, because at some point later, one is likely to outgrow the capability of the pickup they have.