i am hoping someone can give me an approx cost (or possible litres) for
this.....

I have a property in Turkey so hot summers from may to end of October and
very little rain during those months in fact probably no rain for 3 of those
months.

Costs vary from country to country so possibly could somone give me an idea
of how many litres of water it would take to keep a lawn green during the
summer months, it is a course type grass and not to `bowling green` or `golf
course` standard.

the lawn is approx 680 sq feet (75 sq metres)

I only use the propery for 5 weeks of the year and wondering about the costs
of watering as opposed to getting some gravel chips put down, as it might be
too expensive to maintain the lawn.

thanks