Become an accountant. When I used to work for one of the big firms we took on loads of engineers. They started with no knowledge of accounting, got full pay to effectively study for the majority of their first 3 years and had a world recognised qualification at the end of it. Pay rates went up each year and you could always jump ship to a corporate environment (or banking) once qualified and expect to land a job paying circa £40k. Not bad for a newly qualified with only 3 years of working behind them. Work conditions were generally flexi time and our firm allowed you to work from home once you had proved yourself(read that as study or stuff about).
Good luck.