I have a High Wall PUP...kind of like your hard-side...kind of.
I have a Q-2200 that I store in it's original box in the rear hallway between the rear bunk, bath, and furnace/cabinets. I realize your floor plan is different but perhaps it will fit under the table or in front of the refer?
https://res.cloudinary.com/camping-w...DE_T19QBHW.jpg
When I stash my grill, I take the cast iron grates out and put them under a cardboard divider at the bottom of the box. They are heavy, and if they get loose in the grill, they'd wreck the burner. Then I put the grill in there. I have a grill-cart, so I put that on top and cover it with a spare blanket that drapes over the sides. This keeps the cart from banging up my bathroom wall and cabinets. It rides nicely even when off-roading deep into the forest. (We're lifted and often go in 11 to 12 miles to boondock.)
I understand that storage space in a folding camper - when folded - is at a premium and my PUP has more of it, but if you start with the grill and fill in around it, perhaps that will work. What's under your flip-up bed? On the other hand, my go-to for any overflow is my TV...in this case the bed of a RAM 1500.
P.S. I learned the box trick the hard way. My PUP came with one of those crappy steel grills that hang off the side of the camper. This thing self-disassembled several times in our boondocking travels. I finally took an amazon box, padded the floor, and store the grill in the box. It fared MUCH better.
By the way, if you want to be able to plug your Weber into the RV propane tank connections,
this thread has a pictorial and parts-list description of how to do it. Scroll through the entire thread.
Good luck finding a home for your new grill. I love mine.
__________________
Jim & Renee
2020 Jayco Jay Feather X-213
previously 2014 Forest River/Rockwood HW 277
2006 Ram 1500 4WD Crew with Firestone Airbags
Every weekend boondocking in the National Forests or at
Lake Vallecito.