I'm still a newbie here, was reading through some of these old posts and would like to add to this.
I was a 1/2 ton guy for years(and still am to a point) I got a deal on a 24' enclosed pace, and thought my my 1/2 ton suburban would be light for it but all right. I thought " the flat bed weighs 2k even, how much more could some walls an a roof weight? not that much...surely"
WRONG.
I bought it and picked it up with my K1500 suburban with tow package/3.73's with load levelers/sway control on the trailer. pulled fine from Topeka to Lawrence. thought it was kinda heavy though. cleaned it up and put some tires on it(previous owners had 'P' series tires on it

) and weighed it. I thought it would weigh about 3300. LOL. It IS 4300lbs absolutely empty!! Lets do some math:
Burban with 1/8 tank gas: 5680
Burban with 1/8 tank gas
hooked to trailer: 6100
trailer by itself miss'n some
plywood inside hitched to
burban: 4300
that's about 420 or 10% tongue weight. I havn't weighted the gs or tools but i'm assuming about 4200 for tools/gs. then 175 lb generator. That gives me a total of about 8700 with a tongue of about 870 to 900lbs. add that to the suburban and that gets me a suburban weighing 6550 without me in it and no gas. a full tank will weigh 220 more. i weight 220. that makes the burban weigh 6990...just shy of 7k.
Burban specs: 6500lb tow rating by the manual with 3.73's that it has.
7300lb gvwr.
As you can see that is very marginal. A few accessories bolted on, here and there... and then bring some extra tires and wheels... come home with just about anything from the swap meet and your overweight.
What does overweight mean? you probably won't get pulled over or weighed.... BUT.... If what if some dumb a$$ pulls out in front of you? You know... the same type that come out of the wood work every dang time you hookup. You hit him/her. The cops find your stopping distance to be a factor... then they weigh you.... your over. Will your insurance company pay for damages and injuries? Not a chance. They are out to make a buck, and if there is a loophole for not paying a claim, you can bet your a$$ they will use it. You will be holding the bag.
I know you guys just love to hear sermons, but I got the same treatment when i was trying to pull the big enclosed with a half ton. I am glad I listened. I now have a 3/4 ton Suburban and it is STABLE, just judging from the one time i have pulled with it so far. this will be a way less stressful ride and legal too. It has an HONEST 10k tow rating, and 8600 gvwr(this was limited by a GM/ cafe/tax thing... could have been way more)
BTW... how many of your 1/2 tons have brakes like this (13"x3 1/2"). and a 4" stack of leafs... and bellowed air bags?
Bought this rig needing TLC for 2000 and put about 700 in it so far... mostly maint stuff.