I've heard different stories concerning guide fees. My wife's cousin got lucky 2 years ago and got a cow tag. He used a guide and scored on day 3 of the hunt. He gave me an idea what the fee would be but there are a few variables on what type of service you want.
But, I've been applying for 11 years now and still waiting to get a tag. I'll worry about the fee when I actually get awarded a tag which may never happen.