I'm looking for a bit of advice on behalf of a friend. He has a small group of volunteers who help him out a few times a week and he's just advertised for more people. He's been contacted by a voluntary organisation who want to send along a guy with aspergers. My friend already has one volunteer with aspergers who requires alot of additional support and supervision. My friend has no paid staff to help him and massive projects and deadlines to complete and he's really struggling. How could my friend best respond to this voluntary organisation?