I know how you feel about 'hoarding/collecting/hobbies its in our blood', when my father passed my brother and I had to clear the house to sell it (i didn't want to sell but my brother did, you know how it goes), an just like you 'I’m sentimentally attached to anything no matter how small . I have memories of all of it and your right it was also an archive of my family's life for me. So, likely my partner was very understanding and said it was okay to bring most of it back to ours and store most of it in the loft, so my kids can enjoy it in the future.
I hope your hand and thumb gets better soon and you get to build a great new arcade room