Thanks guys for your answers.
appfo09 - I did not check that so I am not sure, though I think EU citizenship should be fine.
cwatters - thanks, this looks quite interesting and probably I will apply. This might be pretty attractive opportunity for the upcoming season. Do you have any information what are the approx. wages for experienced flight instructors there (2 years of experience in flight instructing, double FI/FI, aerobatics etc.)?
The advert is quite enigmatic "Wages are competitive, dependant on experience and include an attractive benefit package. "