I know the feeling! My Autistic son and I moved from a 3 bed semi to a 2 bed bungalow almost 8yrs ago.
As you said the amount of crap you find is impressive!, just to make it easy we moved over the Xmas and New Year period so nobody was available to help apart from friend with a small pickup truck!
Best of luck 🙂
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!