All DRV's have 8k axles or 8k MorRyde suspension standard. The larger triple axle DRV units have 3 8k axles with a 24,000lb rating. 17.5" H rated tires and rims are standard. Then figure 20-25% pin. So having a DRV 43' unit weighing 23-26000lb's isn't unheard of.
The frame is over engineered to begin with so the limiting factor is your truck.
43 Naples
Length 43' 4" | Est. Dry Weight 19,400 Lbs. | GVWR 23,000 Lbs.
Specifications
15" Custom Triple Box Tube Frame
101" Wide Body Frame
Goodyear® 17 1/2" H-Rated Tires
Automotive Disc Brakes
8,000 lb. Rated Axles
Taken from the DRV website