I’m Looking To Teach A Family English This Summer In Or Around Aosta In Exchange For Housing In July (for 5)

I am an American citizen currently living in Chicago and I am interested in taking my kids to Aosta Valley near Milano, in Italy this summer. I am unable to find available hotels for the month of July so I am looking for housing for myself and four kids – in exchange for teaching English. I am a paralegal and a real estate investor in the states and I am also considering to invest in Italy so I am looking for like minded individuals/families if possible, but not necessary. Can anyone give me a good tip how to find a good family (my kids can teach English to their kids also) who I can trust with housing and would be interested in learning more English from me? Thank you.