I would think it would be very hard to set up living with another person who has a child on the austistic spectrum. That would be blending 2 families with autistic children, and making ALL of the austistic children go through some pretty major changes. Realistic for a night of babysitting, but for living conditions?
Of course I'm looking at it from the problem angle; (4 tantrums instead of 2, eating peculiarities of 4 instead of 2 etc.) What do you see as the benefits of living with someone else who has kids with autism?