I've done a few courses over the years. There are only two top people I can say I've had proper contact with and only one of those who I could phone up today on his mobile.
He charges (approximately) £ 25,000 for a sales letter, £ 5,000 min for a website and £1,200 per HOUR for consulting. In fairness, he probably works in more competitive businesses than carpet cleaning.
If you are in a competitive niche, then ongoing SEO / webmarketing will be something between £ 500 to £ 2,000 each month. I recently costed a job for myself and got very similar figures (over four figures). The entrepreneur may well have a network in place already which may allow them to reduce the cost to you.
If someone is doing a bespoke service for you for £ 200, then bite their hand off now.