I think its important to have something to look forward to - especially at the end of treatment. So while I wish I could do a trip away, for now I'm just planning and researching a holiday option to take at the end of the year. Hopefully you can save and do something similar.
In the meantime, what about a visit to a friend or family's place? I feel like I need to get out of the house sometime. And while I wish I had the energy to clean/sort and do some things that I've always wanted to around the house, the reality is that I'm not up to it at the moment. But I did get my sister to visit and help with de-cluttering a few things. I'm thinking of asking her to come back!
Hope you can manage to get a bit of a break. Am sure there must be a few things you could get out of house and do, which might give you a bit of a break, given that a holiday is not an option just yet.