The tall cabinet between the kitchen counter and the bed is PC's typical slide-out pantry. Measures about 13 inches wide from the edge of the counter to the side of the wardrobe that hangs over the foot of the bed. The usable inside width of the shelves is only 6 inches. Despite the loss of space due to the slide-out mechanism, I find it a good spot for things like bleach, laundry and dishwasher detergent, generator oil, WD-40, spare shampoo, vinegar, Calgon, etc. Basically things that I don't want to spill but won't be needing to access all the time.
The tall cabinet between the dinette and the frig is about 12 inches wide, with usable inside space of a little over 10 inches since there is no slide-out.
You are correct that there are two cabinets. The taller one on the bottom is tall and wide enough for a guitar in a hard case, plus room on the floor for hiking boots. I put hooks on the inside walls up high and hang jackets and a heavier coat in there, and that helps cushion the guitar from moving around. I suppose a golfer might find that a good spot for golf clubs!
The smaller cabinet above that also does not have a slide-out, so has that nice interior width. I was worried that it was going to be a pain to reach things in the back but it hasn't been a problem. I put extra paper products and light-weight cleaning products in there, and it is easy to stack them and keep them fairly neat and accessible.
Not sure what you mean by the measurement of the "vertical stlle framing pieces". The slide-out pantry is just under four feet high, then you lose some of that space due to the slide-out mechanism. The tall cabinet on the bottom, next to the frig, is four feet two inches, top to floor. The cabinet above that is two feet high. Adjustable shelving might be nice here, depending what people want to store.
Let me know if you have any other questions.