Me, I have danced both. However, the original post is inquiring about the charges a friend was quoted in order to compete with the teacher. So, in essence, dancing pro/am.
I find it significantly less money to compete am/am however, finding a consistent partner is, sigh, exhausting in itself. Which is one very good reason I have scaled back competition and now enjoy practice as well as socials in other disciplines. I love pro/am as I have a great teacher but agree with others - cost is increasingly bizarre.

I thank you all for your responses. It's good to read different perspectives and experiences.