I just checked in an E pro at the shop today. I think it was a custom order. Had a lithium battery under the bed and a 3,000w inverter/charger. Also a real battery monitor and three solar panels on the roof.
Must have added 10k to the price.
It wasn’t a toy hauler though, it was a bunk house.
They offer a trim package that does that. But not sure what equipment they use. For people with $ which till interest rates shot up seemed like every Joe and Wendy handing $40k over to RV dealers for RVs that sold for $18k pre pandemic it makes sense. But for handy types makes sense to get as basic as you can go and add what you need etc.
My ideal setup, no oven, no stove top, just induction hot plate. Nice Portable grill setup outside will be used 99% of the time. Kitchen counter will see more coffee maker action basic breakfast and lunch packing use than full on dinner cooking. 12v fridge enough solar to keep 100-160ah of battery fresh with fridge running which isn’t difficult in the regions I travel. A small propane/ gas generator for the occasional backup charging needs and hot plate use etc.
The biggest thing for my need is inside gear hauling ability, and separate bunk bed ability for my kids Queen for parents etc. The 19FBTH is about perfect. I do wish the trailer was 1foot shorter bumper to ball, and less kitchen cabinet ie more full width across the back.