# of posts doesn't determine the 1/2 ton truck specs on how much weight it can carry and how much it can pull.
There are 1/2 ton trucks out here that can tow a 10k 5th wheel trailer. Their going to be slow on the road pulling 10k so you may not like the hassle.
The new or used F150 HD regular cab 2wd Ecoboost or 5.0 engine has a 8200 GVWR with 4800 lb RAWR E tires and wheels and has a 10k tow rating. If you want a crew cab or super cab your payload and tow rating and ability gets smaller.
The new GM and Rams 1/2 tons simply don't have the rear axle capacity to carry 1800-2000 lbs of pin weight from a 10k trailer. However....
The used '00-'06 1500HD GM 6.0 engione 4l80E tranny and has a 8600 GVWR with 6084 RAWR E tires and wheels with a 3000+ payload and over a 10k tow rating.
And the used 1500 Mega Cab Dodge trucks have a 8510 GVWR with 6000 RAWR Hemi 3.92 gears E tires and wheels. This truck sits on the 2500 frame and has the same brake system.
I don't think you will enjoy pulling performance a 10k trailer with a smallblock gas engine in a 1/2 ton truck especially in the hills or high wind parts of the country.
Personally I would be looking for a 3/4 ton truck.
If used look at the 8.1 GM gas engine or Fords V10 engine in the used trucks as they don't make those towing beasts gas hogs anymore OR...
A new or used diesel. If used beware Fords 6.0 diesel engine.
spell check Jim