You might rent a villa or apartment. We rented three for 1 week each in Tuscany in October 2000. We found that being in a town was better because we could explore more locally. You would definitely want private outdoor space for your group. There are lots of agencies that rent home. For Italy, you might try my list: http://francesw.tripod.com/italy.html

Try other directories too - http://www.looksmart.com, or Open Directory http://dmoz.org/

Others in this group have rented as well and can offer advice.

Frances