We all want one at 500 euros a month for a 4 bedroom villa!
I agree with Zidanie! Benevento area is lovely and you have a lot of choice of smaller places like Grottaminarda, Mirabella Eclano etc, and then even smaller places like Frigento, Sturno, Paduli, Apice etc,. Beautiful area and only an hour from Napoli. 2/3 bed villetta starts at about 450 euros a month for something unfurnished and in good condition.