Can I make another suggestion mate. Especially with your engineering background.
If you're purely thinking of long term and have no particular attraction to accounting other than its good money and desk based what about doing your Prince2 and or SixSigma.
Project managers earn a fricking fortune. In the finance industry a contracting project manager will be on an absolute minimum of 400 a day and employed 40-70k (doc might be able to verify).
It's money for old rope as well provided you can talk the talk.
I did prince2 before I decided I was going to go crackers doing a job I hated for another 15 years and I could have walked into a junior PM job even with limited experience.
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