The pricing for my SEO consulting services averages to roughly $150/hr, customized for each client.
Every company needs a 1 or 2-day SEO audit to determine both quick fixes and an overall quarterly strategy.
Afterward I usually suggest one day per week for 3 months, with more days and for longer if a large website. This is followed by a new 3-month SEO plan or at least monthly, perhaps quarterly, check-ins. Fewer than a day weekly is fine but extends the initial 3-month timeline.