You can also do Ibiza on a tight budget dont forget. Some people think nothing of blowing well over a grand per week but where Im from thats a fair whack of money and as good as Ibiza is I can't justify that expenditure on partying. Im sure it probably puts a lot of people off Ibiza as well which is a shame considering their falling tourist figures (or am i mistaken?).
Id say Morb's pricing seems about right, or close enough to how Id spend my cash. Another tip is to research the nights that are on. For instance, if theres a few of the biggest nights on on one night, you may find a smaller brand with dirt cheap tickets. This happened with Viva! Fundacion last year when it went up against Cream and Deep Dish for the Thursday spot. Only risk of this, is that it may not be as busy at it is on one of the top nights. But 15E to get into Space and see Sasha, Lawler, Masielo, Omid, etc. is good going (as opposed to 50E for Pacha and Amnesia on Thursday). Carl Cox seems to be good value as well, although I haven't been myself.
Don't forget you don't NEED to go to a big club every night. I discovered Plastik in San An last year, and I'll be there every night Im not out reaching for the lasers. Cheap as chips and a quality venue. Gonna seek out Hush this year as well.