I used to love silks for office work, but they do deteriorate fast if not hand washed, Be sure you use a very fine needle, and silk pins. I would actually make a sample first, because I have a feeling machine quilting would not work . In the sample, you will aso learn whether seams need reinforcing.
Also, the heavier silks may be your best bet. Before you buy online, get samples or visit a fabric shop and see what weight you want - write down everything on the bolt end if you are going to compare aples to apples, not online oranges.
It will be a real challenge.