I have a 2014 36RL. Dry weight is 13,335 lbs. (exact out the door weight as weighed at the factory) without Quartz Counters (which they don't offer anymore).
After delivery we added the Onan 5500 (296 lbs) and Ariston W/D (230 lbs combined). Both WD and gen are forward of the axles on the 36RL.
CAT SCALE results (note truck weight of 9,140 lbs and rear axle weight of 3,980 already deducted from figures below)
no water or food
PIN 3,480
AXLES 12,400
Total trailer - 15,880
full water and food
PIN 4,320
AXLES 12,900
Total trailer - 17,220
GCVW - 26,360 (technically this puts me in the right lane with a 45 mph speed limit on the passes through the rocky mountains in CO).
I brought it home with an F350 SRW, and found out quickly that I was over the 7K axle weight of the truck without water, and very close to the maximum capacity on the rear tires. I needed water, so we went to a dually.
Also note, we went for the 8K axle option and G614 tires, which gives us a maximum axle weight of 15,000 lbs (tire limitation), and a GVWR of 17,500 lbs. With the dually and with water, I have 8,080 lbs on the rear axle of the truck.
Original truck was a 2006 F350 SB CC SRW with a 6.0 3:73 and 7K rear axle. Current truck is 2008 F350 LB CC DRW with a 6.4 4:10 and 9K rear axle.
Many folks tow the 36RL with a SRW F350 but they are at the limit without water and forward gear. No generator, or washer dryer. The Fresh water tank is directly below the basement, forward of the axles. The tank capacity is 104 gal.
Hope that helps - I'll be honest, I did not want a dually, but now I have one.