Blackcat1 Hopefully someone who has experience with the 1 week version sees your post soon.
When I met my radiation oncologist I asked about the 1 week version but I wasn't eligible. I was interested in it because I had a 100km round trip each day so I was hoping to save a lot of travelling and juggling with my work (which turned out not to be a juggle when I found I could get an 8am radiation zap and get to work at 9am).
If I had been eligible I would have wanted to understand more about the side effects but I guess it can be hard to know for sure how any individual will come through it.
While the 3 week version I received took a lot of travel and effort, my skin survived and I was able to work through the fatigue. It was comforting to be seen each weekday by the team as they monitored how I was reacting to the treatment.
It sounds like a difficult decision to make as there are pros and cons on both sides. Ultimately you will get the treatment benefits either way.