I can scale 50K with an aluminum trailer and 46500 with a steel trailer. Truck is slightly over 19K with a 290 WB, Cummins N14 18 speed, Sleeper is fiberglass. Most 72 inch sleepers are 270 WB alone and can weigh up to 17.5 to 18k lbs with standard sleeper. I have a 1 piece frame. I know she looks heavy, but I find this truck is the weight of a late 1990s W-900 with 86 inch sleeper. Besides I can cook and stretch out in mine. (grin)
In my W9 with full gear and half tank of fuel I could sneak a 47k load but usually I try for 45k or less
This proves one thing. I carry way too much junk. It's just pathetic that my cheap ### columbia weighs almost as much as your big house kw.
Spyder, a big bunk W-900 can weigh 23 to 28k with those long fiberglass hoods. Also helps that I don't have oak cabinets, real hard wood floor or granite counter tops for my kitchen area. All those "nice to look at" things in a guys sleeper don't make any more $$ than a lighter truck. I have a huge fresh water tank I run with dry during the day. I fill up fresh H20 on the fuel island wash my windows and park in the very back row I can find. Water weighs 8lb a gallon, weight I don't need to haul around on my fuel $$.
I employ a "one year" rule on "junk" in my truck: If I don't use it or touch it for 12 months, it goes home.
Getting a flat from Mercer doesn't sound like a bad idea. See what happens and what's available for a couple months. You can always turn it back in and buy a step anytime