Your fees sound fair. My barn charges $50 for about one-half acre; we provide feed. He has two sets of stalls, some for $150 a month and some for $200. He provides wormers which the owner administers, and cleans the stalls once a week. The pasture isn't cleaned, but never looks bad. Here in CO that's a good deal as hay is in short supply and making stock owners very nervous. My BO grows his own, so hay is not a problem. I count myself lucky to have found this place.