Does she just want squares put together or something like a 9 patch with sashing? I just did this for a friend from her fathers shirts. I had to put interfacing behind each one, some were so thin ( used something specific for silk fabric it was very light and didn't add much bulk.). She picked out a quilt pattern she liked and I was comfortable making. I'm thinking of asking $250 + the quilting on my longarm. Only you can know if you can get it done by Christmas. I felt better about having her pick out the pattern so I knew she would be flappy with it. I would want to see the fabrics first. If they are slippery polyester blouse fabrics they will be more time consuming to handle.