The mind palace thing would probably be simpler if you googled it. Smithsonian had a good article.

i'm being sincere. For example, I have reached the point where there are very few additional books I wish to own, and sometimes I'm ready to let go of them, so if I had to guess, three more 6 ft tall 3 foot wide bookshelves, and I'd never have another book in a pile. For clothes I would need all of our closet and probably one of the guest room closets - everything would be easy to see and use. Sewing/fiber arts would need a good sized bedroom, although, if I had the space to leave the projects out, I would work on them more often, use up more supplies, and then need less space. when my spinning wheel was actually set up on the porch all summer with bags of alpaca, I made a whole bunch of yarn, because I could just spin for 15 minutes. But dh was annoyed because there was always fuzz everywhere.

once dh told me I could have as many chickens as I wanted. I built extra coops, ordered a bunch of chicks, and I now know, 100 chickens is too many. 45 is about right. I tore down the extra coops and turned the space into goat stalls. If I ever find out how many goats is too many, maybe I'll let you know. But I'm pretty sure milking 6 at a time is plenty! Maybe I could handle 8, but not for too long.

and when I pack stuff neatly away the way dh likes it, I tend to acquire more stuff, but when I have it out where I can see and touch it all the time, I have less interest in more stuff. I think part of the reason the doll collection has gotten so much larger the last year is because dh took the shelf down and the dolls got mostly packed away for months, and my hoarder brain thought I didn't have very many.

so, if I could have my space full of stuff and my stuff out on surfaces/shelves in my space, I would probably reach equillibrium. I would not keep wanting "another room" nor would I build a Collier (sp?) maze. I'm a sentimental/utilitarian/anti waste hoarder who likes living in a bower. (Google also bower bird)