Could this be possible?

One of the things on my list of things I could do in the next few years is a baby. I don't want to have two, but I want a child to have siblings - how could I do this?

What sort of house/living arrangement would be required to house 4-6 adults, 3 teenagers, 2 dogs, and 2-4 small children?

Bedrooms
communal kitchen
private lounge spaces
communal sewing room
communal computer centre - with broadband!!
garden
bathrooms -- at least 4
communal tv/lounging space
workshop large enough for 3-4 to work at the same time
Storage!!!
private small kitchen spaces

Near public transport to workplaces and schools
Near good shopping centre

Anything else?

Options to make it happen:

Buy the house across the road and build 2 units at the back
Rent out existing houses and rent a really big house or a set of townhouses
Sell existing houses and build the perfect communal living arrangement