Because of the heat?
I mean i don't know if your wife likes to walk on the street when it is 38-45 degrees celcius outside but mine doesn't lol
And sorry about 4000 euros. It is more like 3000. My mistake.
Still if you are the one only looking for money EK might be a good choice. But if you want to balance things as flight(fatigue) and moneywise i would strongly recommend TK wide body.
TK 737? That is a whole different story but types of A320 family, A330, A340 and 777 are pretty relaxed with the flight times and the rest times. However the annual leave is very bad in TK. 14-20 days(i don't know the exact number of days).