What we do now...two adjoining MBs, I move around a lot...
(We would ALL like a bigger kitchen - sadly, that's just not an option...)
I have a medium large kitchen but nothing like I want.
In fact, my notion is a living quarters in a polebarn with a bunkhouse style bedroom and a large commercial kitchen with room to run a single rail system for butchery and the large do dad's like good sized grinders and staffers as well as drying cabinets. Do all your bulk prep and preservation there along with not having to clutter up the garage with freezers tye way mine is currently.
I figure you want big strong sons, you feed them well. Seems to me that translates to the whole family.
Re the adjoining...hmm. would have thought the respective master bedrooms would be spaced as far apart as possible would be ideal would it not?
That was part of the motivation for choosing my current home.