Reality TV
Well said MishyMoshy. Given that 75 million is about the price of one pint per taxpayer and will last till 2015, I reckon its pretty good value.
If the price comes down much further, it will become feasible to fund the whole thing as reality TV. Might beat big brother, particularly if something goes wrong... You could vote on which poor bugger does the space walk to empty the latrines or whatever it is they do up there.