How wise he is to start now rather than later. When John was diagnosed, it was an Emergency. At least Frank can ease into this and prepare as best he can. It will probably be difficult at first. He will need to establish his dry weight off the top. It can be tricky, but they will help him. Over time, he will feel a big difference in the way he feels, sometimes, almost instantly. When he starts, he will see just how sick he has been and didnt realize it.
Have him check into other options too. Lots of peopled are doing D at home now, and are doing it well! We have done very good with Home D. Its like second nature to us!
Good luck on Tuesday! He is lucky to have you there for him. God Bless you for that!
lmunchkin