If it's $50 per class - keep looking.
That should be for the course. Our classes run $65 for an 8-week course. She teaches OB at basic, intermediate, and advanced levels, and rally for that rate. We also have use of her training facility for $5 per hour per person when it is not in use for classes. I would suggest you stop in and preview a class before signing up so you know how the classes are run and what to expect. Or, get references.