Every adult gets 2500/month, so a family of 2 adults + 3 children would get 5000/month which is nowhere near enough in most places in Switzerland.
The other scenario is a group of adult friends or relatives.
What makes it any different from a bunch of working adults living in a large house and splitting the rent?
Check for example this sites/news: http://www.swissworld.org/en/faq/living_in_switzerland/ http://world.time.com/2013/05/01/bachmann-on-switzerland/ http://voices.yahoo.com/how-move-united-states-switzerland-3...
And Swiss don't like too much immigrats, and even cross border workers: http://www3.varesenews.it/english/articolo.php?id=184350