I'm a bit older then you and have been invited to S1 in April 11 too! I know what you mean about financing it tho, it is worrying. My hubby pays the mortgage and bills and I am a driving instructor, which I can always keep, so in slightly a better position then you but it is still a big decision whether to proceed. I think you should defo attend S1 and see how far you get, otherwise you will always wonder.
I wish you luck with whatever you decide. I may even meet you at S1!
