I have completed one project. The second has had one go and I have got a technique sorted for a "gusseted" bag - I just need to refine and practise!
Bed cover - I used an old duvet cover (gosh, when it was on the bed I had not seen how worn and thin the material was, but it should be Ok for this purpose).
First bag - I used some of the curtains I brought in a charity shop for £2 and part of the duvet. So no cost. it suits my 3 weekly collect of 6 novels and an art book from the library!