Even Russian jets have been bombed and shelled at their base in Latakia, so its definitley better to keep them out of range in Diyarbakir.
Also we're not the US and occuyping and building bases all over the country.
Why do people regard BMCs engine as domestic or the first domestic when Otosan has locally from scratch developed Ecotorq engines?
Both companies are 50% foreign. Both claim its domestically developed.
Perfect timing to post this:
During the first Iraq war Americans claimed they intercepted 90% of the Iraqi missiles, well turns out it was BS:
https://www.nytimes.com/1993/11/21/world/patriot-missile-s-success-a-myth-israeli-aides-say.html
The Americans do have some significant oil and shale gas, I believe they are on the edge of becoming self sufficient and have allowed exports and exports were banned for a few decades there.
But yes you can have a decent economy without oil or gas.
S400 of the shelf - around 4 billion €?
Co-development with Eurosam - not clear
Aselsans own solution - total costs also not clear
Patriot - probably 2-4 billion € too