Note, this is a highly debated topic, but if you’re buying used (or new I suppose) you will find 3/4 ton trucks out number 1 ton trucks by a huge margin.
Add in your want for a regular cab truck and the pickins are fairly slim in the used market compared to crew cabs or even extended cabs.
So if you find the “right” truck and it’s a 3/4 ton, know that generally the only meaningful difference is the spring capacity of the rear suspension. In other words, 3/4 tons are basically re-branded 1 tons with a lower gvw rating imposed, generally for tax, operating or license purposes, not capability. There are “options” if you get into the newer models specifically with 1 tons offering different drivetrain components or power levels but none that matter for just plopping a TC on the truck. (Except for the Ram w coils thing).
IMO do not turn down the “ right” 3/4 ton just due to rear springs.
By the same token, I would absolutely consider expanding your search to short bed ext cabs or crew cabs if the CCs aren’t too long for your perceived needs off roading.
You will have far more options to choose from and more dry/secure/useable storage with any bonus cab type truck.
On the flip side, reg cab used trucks are a financial bargain with the same general capability due to their lack of popularity.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold