What PU to Buy

The RAM 2500 6.4L is at the top of the list for most. You can't go wrong with such a capable truck. It can pull a TT at near the performance of a fifth wheel.
MM49

I have a 2007 3/4 ton Dodge with a Cummins diesel that use to pull a 30 foot TT with a Goldwing motorcycle in the P/U, I have gross weight of 17,500lbs, and I have no problem at all...hope this helps.

I agree as stated above. most salesman will tell you "oh yes this truck will tow a mountain". It all depends on what you need and or want. I personally would not go with a 1/2 ton unless you buy a small TT. a 30 ft, some manufacturers say their TT's are 1/2 towable. I had one of those and did tow with a 1/2 ton. I bought a 3/4 ton and it is night and day difference. I have a 35 ft now and the 3/4 ton does a good job with it. my way of thinking is, if you buy a 1/2 ton now and later you go even bigger or heavier, then you have to buy a 3/4 , so why not buy once and get the 3/4 now.

I think you should look at the weight of a 30'trailer you like,along with the tongue weight. Then decide what truck/engine combination, you are going to need to handle it.
Do not allow a TT salesperson, or a truck sales person make your decision for you.
Please do the research, and post questions here.