Rjay,
Thats the thing im touching on, with regard to the whole caa 'flying for reward' heading. Would flying and not being charged be classed as reward in thier eyes of the ANO. I wouldnt actually be earning out of it, but at the same time I would not be billed for the hours!
I would envisage that saving money is different from earning money. Which is the case we are talking about here.