My first thoughts are an "independant contractor" is basically someone who is in business for themselves. You supply everything & they pay for it through your fee, hourly or otherwise. If you hired a plumber, electrician, lawn service, etc. to work on your house that is an independant contractor. You need to add up what it costs you to run the business which is equipment, consumables, health ins., business ins., legal, accounting, taxes, etc. After you have covered all that you add on what you want to take home. That gives you what you should ask. Most small business owners are in the $70 to $100 range per hour.