Is their any decent priced places that we can get married at around Cambridge Ontario?

We are in need of a place to be married at around Cambridge and surrounding area. I have called many different places and the average price is $600 however I believe that is an outrageous price for just a half hour. Can someone help me please!Is their any decent priced places that we can get married at around Cambridge Ontario?
I live down by Sarnia Ontario- but have you tried city parks- they are usually quite cheap (we are paying $120 for our wedding at the park) or maybe a family members backyard (free!)... If you are having a 20 minute wedding or less then people can stand and you only need a few chairs for any elderly guests...