I wouldn't mind mine pre-cuts but would want my fabrics and my patterns. You could start with those ladies and see if you enjoy doing it for others. Maybe offer them $5 off their next order if they refer someone to you with an order if you want to continue. I would wash their fabric as you don't know if it might have little unwanted "pets" in it because who wants bed bugs in their stash? I would tell them before hand that you wash all fabric before cutting.