Chopperpilot
In the UK as an instructor you can expect to be paid £40-£55 per flying hour depending where you fly. A free-lance commercial pilot will earn from £50-£70 per flying hour depending on experience and the type of work involved, ie. pleasure flying or pipe line inspection etc.
As a North Sea co-pilot with between 500-1000 hours you will be paid between £22,000 and £27,000 or so. These figures are approximate but should give you a rough idea as to wether you want to 'give up the day job'