Cottages has a washing machine for guests that operates on quarters. The nearest laundromat with dryers is at Amigos Gas Station on Centerline Road, about 5 minutes away from cottages. They offer a drop off service with your clothes ready the next day (perhaps same day if you drop off early and the lady isn't too busy). For a weeks worth of clothes this would probably run about $15-20. You could also do it yourself there for cheaper but I wouldn't want to spend any of my vacation sitting in a laundromat for 3 hours watching my clothes. Either do it yourself at cottages and hang stuff up to dry on your balcony or in the room, or just pack light in carry-ons.