you could get the list from the govement where you register marriage,that is the list about people could manage your ceremony. then you could contact with those people on the list, the cheapest cost $100, you could let this man hold the ceremony in park. so all the cost will be $100. this is the situatio in Ontario in Ottawa.
if you are christians or any other religion, you can have a wedding ceremony in the church. Many people will help for you for FREE. but if you only want to save money, seemed impossible.