@gigafart, it was interesting and insightful to read this... a couple of thoughts:

I don't know you, but part of my trouble with working (from home, as I do) relates to the fact that I am ADHD as hell (at least that's how society wants to label me) so concentration is tough. And there's nothing that'll make me check out and start looking for distractions faster than something that looks too much like a "dedicated work space."

Now, I'm an "oldfart" so I've had a while to work on this... but regardless of when or where I am trying to work, getting things done is usually a result of me "having to lie to myself" about where I am, and what I am doing. Sounds to me like that's a bit of what you're getting to work for you, as well.

Most workspaces are inherently dull... and "inherently dull" is a creativity killer. When you drag your setup into "an awkward spot near the kitchen," sure you're in a higher energy spot... but you're also (subtly) lying to yourself about working; somewhere in your subconscious you're getting away with something.

I have a home office... Yeah, it's a work space, but there's a cat bed on my desk; my wife's eBay business has its "shipping department" in the middle of everything and there are a jillion distractions... and I do all my best writing out on the adjacent back porch. I joke around that ADHD means having a bad case of "oh shiny," but I really just turn that to my advantage.

Long story short... you sound like you just need to work where the inspiration finds you; so CREATE that reality!