Since you are not new to RV's, you can tell what looks well made and what does not. You could also check a used unit out and see if there has been leaks or damage.
And since you are looking at using your existing Chevy 2500, weight is your enemy. As others have said, you can beef up the 2500, but it will cost.
As others have mentioned, try finding a decent used one that you can try it out. That will be a lot easier to stomach, if you find out that something doesn't work for you. There seem to be a fair number of older TC's on Craigslist, as well as tie-downs etc. maybe try that route and see if it works or not.
Good Luck!
Garry
