Don't despair, man. Your build is far and away the single most amount of heart and effort I've seen anyone put into a project on here.
You've thought your way past so many other problems with this, the solution will come.
Taking a break can be a good thing, I've found my brain sometimes thinks on problems best when I'm not consciously staring at it.
You'll get to the end and realize all the setbacks and wrong turns made the journey far more interesting and fulfilling than if everything had dropped into your lap ready to go.
My TARDIS took about 2 years, and along the way I had plenty of screw-ups and things I didn't think I'd find a solution to.