So you are planning to hand quilt? For broadcloth, I think the ease of handquilting may depend considerably on which brand you purchase. In my experience, Kona cotton broadcloth (all the solid colors) have a very meaty hand and I think they would be more difficult to hand quilt. Moda Bella is a finer broadcloth that I suspect would be easier to hand quilt. Broadcloth has a different weave than regular quilting cottons, so I'm not sure how that affects quilting.
I believe sateen is somewhat slippery, wrinkles easily (may not be a factor for you), and loses its shine with washing (again, may not be a factor for you if it's a wallhanging).
For 100+ hours of quilting, I think it would be worth taking the time to get some samples to try out.