There are reciprocity laws that apply to some of this. As my brother mentioned, I have a motorhome with a 32,000 GVWR and 42,000 GCWR. It has air brakes.

In Virginia, you do not need any special license for any RV. None are even available. You can get a CDL, but the "C" is for commercial and RVs aren't commercial (unless you're paid to drive/deliver the RV).

Some states will require a Class A, B, C etc. non-CDL based on the weight rating of the RV.

It is impossible for me to get that type of license as a Virginia resident.