Asking other armies to defend your country, cannot guarantee the peace for a long period of times, because the geopolitical scenarios are changing much faster than before now, and any conflict could throw your country into uninvited war of others.

By forging alliance with Germany in WW 2, Japan sustained huge losses and has to hand over a ruined country to their younger generation, who have to work hard to rebuild it.

History has already written the results of similar scenarios, so it would be a mistake to hire military troops from a political unstable and fragile country like Turkey.

Instead Qatar could work on building up common GCC defense system with the help of old expatriates, that have been living in these countries for decades now. Their 2nd and third generations are familiar with GCC culture and loyal to the core.

They are really a great yet untapped asset of GCC counties, that needs to be inducted in the defense system of GCC sooner than later.

Imagine the strong defense, if Qatar creates a high tech army of 100,000 expatriates alongside the locals.