I had my Peg tube put in the middle of march they say little of no pain, but the reality is that I was sore and tender around the area for at least 10 days. The pain was not overwhelming, but it did hurt any time I used my abdominal muscles.

I have a manual tube, not the pump and have to feed myself 5 cans of nutrient 1.5. Your dietitian will recommend what is appropriate for you.

I didn't really use the tube until I was 2 weeks into my radiation. The changes came fast and furious. For several weeks the feeding tube has been my only source of nourishment.
The peg tube is your friend