My mother-inlaw is in your shoes and the caregiver can get so caught up in it in that sometimes they forget to care for themselves. It's hard and my hat's off to you, I wish you both very best!
I've have two relatives that had strokes so I have an idea of what you're going through. It's hard work but from what I've seen of your work you have the patience and the and determination to pull through this. With a good woman by your side and a good hobby to practice your motor skills with...
Wow! This is an awesome build, I will be following this thread with great anticipation.
With the scale you build on you'll need a whole room to keep and display everything.