you're overweight and you're illegal. im in the same exact boat. i have a 6 ton kubota excavator a 2500HD and i bought a 10 ton gooseneck trailer to tow it. yes i loaded it on the trailer and i moved it once, the truck can definatly move it, but long distance id blow the truck up, but it was too much weight, and very illegal. you need a class A CDL licence to tow over 10,000 lbs commercially. and its a very complicated process. read my post on CutRight Versus the CT DMV. it explains it all in there.
long story short, i was going to buy a 3500 1 ton truck but its not big enough. i ended up basically finding out you need a 6500 to tow that excavator completely legally and you need a CDL class A, may not need the CDL A where you're from, but thats the law in connecticut and some other states.
i sold the 10 ton gooseneck and im just gonna pay somebody to move my machine until i can afford another $50,000 peice of machinery (GM 6500, duramax, eaton-fuller manual transmission, 14' low dump body, 33,000GVWR)