[Motor31]

First off do not get real serious about a rig in craigs list or ebay unless it is in a spot you can actually go look at the trailer. There are too many scams out there to buy something that costly without looking it over carefully and having all the systems checked out. Some things like the fridge are VERY expensive to replace.

Hitchhiker is a brand that's been around a long time. A 33' rig is on the smaller side for full timing but in the right range. It has a washer and drier so you have a plus there. It may also be overweight for the 3/4 ton truck you have though.

I don't have a 2005 towing guide but the 2006 booklet I have lists an average towing range of 10,500 to 14,000 lbs. A few 2006 models with a specific gear ratio (3.10) and the turbo diesel will go a bit higher. You'll need to check with Chevy to determine the actual capacity of your truck. Since you almost certainly have single rear wheels, the axle weight capacity is another limiting factor. A 5th wheel puts 15% to 20% of it's weight on the truck through the hitch. You could be inside the total weight capacity but overloaded on the rear axle depending on the real pin weight of the rig.

Only consider the max or GVW of the trailer as no one tows or lives in an empty trailer. The empty weight is not likely to be accurate any how. You'll also be looking for about 2,000 to 3,000 lbs CCC or cargo carrying capacity in the trailer and that does not include a full water tank. You will be putting your "stuff" in the trailer and it needs to be able to carry the weight. Older trailers especially were made with very little capacity for cargo weight.

Look at the axle and tire limits. A 2000 model trailer of that size may have 6,000 to 7,000 lb axles and D rated tires. If the tires are more than 4 years old by manufacturer date (tire manufacturer) figure on needing to replace them no matter how good they look externally. RV tires normally have a life of 5 years even if they only have a couple thousand miles on them. If the trailer has been sitting for months or a year in one spot the tires are probably brittle and will let go soon.