Just a quick look at this from a US supers perspective (and based on the Mid Atlantic region). Surprisingly the article isn't too far off.
As Tom said, I would assume that more of the budget would go to the championship course, even if it is all coming from one source. So lets say its split 2/3 to 1/3 and base some assumptions off the 2/3; so figure $750,000 for the championship course.
The average fert/chem budget at a higher end club in the Mid Atlantic is $250,000 (and probably higher) so now the 18 holes is at $1m. Couple that with the need for less staff (no massive areas of rough to mow or acres of white sand to rake) so conservatively add $100,000 (6 people) in labor for seasonal help and now it's at the $1.1m of an average higher mid level US course. But then you have to compare it to the big clubs of the same caliber, who are spending double that, although most of that would be in salaries for the much larger staffs and easily double the fert/chem budgets. So although they are completely different animals the basics are similar and as Eion said in the article, the differences are in the chem/fert budgets to manage the turf in climates where it is not necessarily happy and prone to disease and the number of staff needed to maintain it on a daily basis (even if the number of staff quoted for the US is on the high side).