1998 International 4700 GCWR?

First check with your state, I think all 50 use the us dot for registration of the company for commercial transprt of any kind.

second you are over 10k, so you have to log

third if you are interstate, you will need an authority to operate interstate, the gvw of the truck does not matter.

fourth, you can pull the trailer with the truck, proper hitch and so on. Also depends on the axle placement, the flat bed straights I owned had the axle too far forward to carry the weight.

Fifth, here is where you may run into a problem, the length of the truck and trailer most likely will exceed the laws of several states. You didn’t state how long the truck is, not just the bed but the entire truck, so I am going to assume it is at least 25 feet.

 

No, not so. I've run an 80K commercial truck in Idaho without DOT (or even without a name on the door). Perfectly legal.
No need to log, either, unless under DOT rules.

Yes, you can pull a trailer, however, I've run a very similar International with that motor, and you will be GROSSLY under-powered if you put any kind of weight on. To the point of it being dangerous in traffic.

Finally, those trucks aren't built to run at that kind of weight (transmissions, drive trains, brakes, among other things). In my experience, you'll be much better off stepping up to a class 8 vehicle. CPM cost will be similar (lower in our case), and reliability - up time will be much higher. A 9100 with a 28' flat would run circles around the little truck, safely and for the same cost.