Here's another vote for a Spartan Chassis with a Cummins engine. Rock solid.
I've owned Rexhall, Newmar, Tiffin, Airstream, and American. Class A's, gassers, diesel pushers, and trailers.
My current ride is an ancient 2001 American Eagle 40' Diesel Pusher built on a Spartan Chassis with a Cummins ISC350. She's all go, and no show. She's humble - only ONE long slide out, which does NOT obstruct anything when closed. You can literally use it with the slide out closed and never think twice.
I certainly purchased it for less than $50k. Not what it's worth today - I've put a few things into it. It was luck; it was selling for $96k at the time. Whatever. I checked on RV trader for you today and you can find similar coaches today without many of the fixings I added.
Most places refuse 45's, but they'll gladly welcome 40's. RV Parks and campgrounds are funny that way.
The roof in mine is fiberglass, not rubber, and it does NOT leak. Mine currently has 70,000 miles.
I installed an electric motorcycle lift in the back which also allows for a towed vehicle. I just don't tow a vehicle with it; either the Harley or the 500CC moped / Piaggio Scarabeo work plenty well for transportation, as does the repurposed Bird Electric Scooter.
The coach currently has 8 235W panels on top; 1880watts of Solar banging away at the batteries.
Speaking of batteries, there are 12 6v 225 AH Trojan Batteries in the place of the original 2. Just a little bit more storage...the MPPT controller is a midnight solar classic 150. It's there to help power the fridge, the biggest power hog. The fridge was replaced by a Samsung electric RF197 - 20 cubic feet of fresh food. The Cummins / ONAN 7500 only needs about an hour or so a day to keep up when dry camping if the fridge is constantly left on. I'm still tweaking with the power settings on the fridge.
The two furnaces are propane, which keep things toasty in the snow, and I've lived in it in the snow plenty. There is also an on-demand hot water heater. 2 AC's on the top.
DirecTV on top from a Roadtrip t4 in motion, with a 32' flatscreen in the front, a 28" in the bedroom, and another on top of the wine fridge. Internet is provided by a Winegard antenna which creates a private Wifi Network, which will happily vampire off of your local starbucks or any other free public wifi, lest I want to use 4g/LTE on it. 2 LED's Roku TV's inside.
No bunkhouse. But...I have a dual shower / bath tub instead.
The washer / dryer works like a champ. There is also more than one safe in there for short and long guns.
Underneath, there's a 32 Gallon propane tank mounted, with another 25G long tank as well.
It's not a million dollar Prevost, but it works well for me....
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