How do i evict a family member who refuses to pay after a verbal agreement?

My parents built onto my house (as my inheritance) they paid for the addition. i paid for part of the addition and some additional expenses in the amount of 15,000.00,with the understanding that they would live here, pay 1/2 electric, 1/2 cable, phone, additional property taxes and home owners insurance adjustment in payment and make their own repairs if necessary. They are not on the deed.They only paid approx. 150.00 per month for about 6 months. It has been 4 years and refusal of payment or financial assistance of any kind, along with property damage and threats to me and neighbors. Other people have been moved in with out permission or payment. This was a verbal agreement (nothing in writing) as I thought I could trust family. I would now like to evict. Can I without problems or sued?