Actually, your post wasn't very long at all! Welcome to this Forum, though I'm sorry you need to be here.
Please read Dr. Brad Boeve's "Continuum" paper on state-of-the-art treatment for LBD. And give it to the MD as well. Hopefully your father's condition can improve with the right medication. It is common for stressful situations to exacerbate symptoms. But things can improve.
http://www.lewybodydementia.org/docs/DL ... nuum04.pdf
You might also contact the Lewy Body Society in the UK. (lewybody.org)