Sherry,
One additional thought. I had the PEG inserted at the end of week 4 of my treatment. I wished I had the procedure right at the beginning. Once the effects of radiation start to accumulate, the difficulty in swallowing that results tends to leave one more dehydrated and under-nourished than otherwise. For me, this made the installation of the PEG more difficult and painful than it needed to be.
Good luck and best wishes for Ken's treatment.
Sheldon