I agree with laknox, your looking at SRW or DRW territory, can you pull it more than likely yes with your present truck, problem being can you stop it if an when needed in a panic stop or going down a 6% grade if needed.
Also can your springs handle the weight without bottoming out, I'm not saying you can't pull but can you do it safely for both your family and others around you while traveling down the road ...
You might look at the KZ line of 5th wheels, they have allot of different models along with floor planes and at prices that are well below MSRP https://www.kz-rv.com/ an are well built :)
Safe Travels