I will weigh in one last time. I wholeheartedly agree that the Q3200 is a truly great grilling machine. It is stylish (to me at least) and the aluminum and glass reinforced plastic construction is highly rust resistant. Although it only has one set of wheels it is not that hard to move around on a deck or patio. On the other hand, the big Q doesn’t seem to meet all the requirements you have laid out. The plastic side tables are adequate in my opinion, but definitely not as sturdy as the ones on a Genesis.
I personally think it sounds like you have a better option with Jason. Why not work with him to have him make you a custom classic Genesis with wood slat trays? If you don’t like casters, he could modify it with both sides having actual wheels. If you are willing to spend, get “rcplanebuyer” heavy duty stainless flavorizer bars and stainless grates (the very best!). You will have an awesome grill that will be FAR superior to any new Weber or any other brand at anywhere near the same price. With some reasonable care it will last you for decades.