It can be great for the next generation moving out of home as well as the empty nesters. It offers financial & physical independence with the added support of being connected to family & friends or people that share a vision for a certain way of life. Designed well it has the potential to be highly beneficial to our environment, using less resources per person than conventional housing. It offers affordability & social connection.
Take a look at this great housing guide http://collaborative housing.org.au
And some more insights here: