What an awesome idea Bel! I was lucky enough to have my mum nearby when I was going through treatment but I am the "soldier-on" type of person & did way too much myself!! If there was some sort of organization that could help out it would make such a difference to so many people.
I think you would have to be very careful as to who you used in this organization though. Although I always like to think that people are doing the right thing, there are plenty of people out there who are willing to take advantage of someone who is unwell or unable to look after themselves.
Great idea though :)