I've given myself a budget of 240ukp per month to spend on flying, which I'm just about managing to spend (and afford). Since joining my group (4 seat tourer) last October my flying has come down to an average of 37.85 per hour - before (renting and training) it was 68.59.
I allocate everything I spend on flying to the budget, except magazines and the capital I invested into the group, but I am also pretty ruthless in extracting cost-share contributions, and the government has subsidised me to an extent 'cos I get lots of fuel drawback.
I seem to have managed 90+ hours this year.
I don't actually share this info with Mrs R, but as a web-illiterate she's unaware of the grisly details at:
http://www.e-logbooks.co.uk/pilots/b..._fly_costs.asp
SteveR