The cadenza section at the top of the last page - one hand or two hands?

if you mean bar 67, I always played it with 1 hand.

Yeah, I always play that with one hand too...

I asked my teacher about this at my lesson: She said it was fine either way, whatever gives the most musical result, and SHE plays it with 2 hands. Having tried a few practical experiments I think I will follow her example. I do worry, however, that although the 2 hand approach may yield better results in the short term , persevering with the one hand method may give a smoother result once mastered. Hmmmm. Much thought required. After all, it is just remotely possible that Liszt knew what he was doing with a piano. On the other hand, it is also possible that he simply didn't understand the problems encountered by ordinary mortals in runs like this!

I think RH alone is better. If it was a show-off vocal line you wouldn't share it between two sopranos.

I don't see the problem - even for a not-absolutely-ordinary mortal like you. It is not a monster like some of his other Cadenzas - like the three in Hungarian Rhapsody No 2 for example.

I think you can just go 1245, 1245, ... all the way down. It means putting the thumb on a lot of black keys - but that is no big deal, you have to do that even in some of Mozart's sonatas.