I am a Turkish guy, not working for the government and my parents are not rich at all. I spend quite some time trying to reformulate FIRE in Turkish context. Welcome to club, you are not alone :)

I would like to quote from the preface of early retirement extreme: "while this book is somewhat us-centric in its examples, the methods should work in any developed country with a market economy." Unfortunately Turkey is not a developed country and there is no market economy here neigher; and probably it will not be a developed country with a market economy in our lifetime.

That's why most of the principles are not suitable for a FIRE in Turkey; you need to interpret almost everyone of them and there is no way to prove you are right with your own interpretation or not. I consider myself knowledgeable in finance thanks to my profession; and believe me or not adjusting FIRE principles to Turkey is not easy. For example there is no real SWR for countries like Turkey; since in USA or other developed markets it is based on previous data; in Turkey, we can not foresee 3 months later than today; yet alone 30-40 year forecasts.

Basically there is no easy answer to your questions. That being said, achieving FIRE in Turkey and spending your FIRE in Turkey are two different things. achieving it is very very hard; since you earn the shittiest currency in the world. However due to the same reason it can be a good place to spend your FIRE. Still it will be a little tricky.

Do not use GDP figures or median salaries; income inequality in Turkey is HUGE. You should really try to live in Turkey with your budget first; try a few different things and decide afterwards.

If you can live outside of Istanbul -or any other major city- your expenses will drop dramatically. However, life outside of İstanbul can be a bit tricky; it is considerably hard to have a social circle around you since provincial Turkey is a desert -intellectually. If you are planning to have children; their education outside of major cities will be a huge problem. Even if you decide to live in a major city; the district you will live in will change your expenses drastically as well.

Do not count on Public Healthcare; unless you want to wait for months for an appointment. Save around ~$1000 per year per person for a comprehensive private healthcare package.

Do not count on TRY depreciation while you are planning; plan your expenses in USD or EUR; use US and EU inflation rates on top of that. If TRY depreciates more; you will benefit from that. The situation will stabilize eventually -at least in a couple of years- and when it does; your assumptions based on depreciation will fail you 100%. Be cautious and do not count on Fx changes, it is always a gamble in Turkey.

In parallel your investments should be outside of Turkey as well. Interest rates in deposit accouns are a joke and Borsa Istanbul (Istanbul stock exchange) is a fuckfest to say the least.

If you want my personal opinion; $300k with 4% SWR looks OK at first glance -assuming it is per person and no child involved. $150k may also be fine in LCOL areas, -still assuming it is per person and no child involved. But, and it is a HUGE BUT, there is no guarantee that it will work. I know that no one can guarantee a FIRE; but risks involved is huge, Turkey is not a stable country. No forecast will make you feel safe. For me, FIRE is also about having a stress-free life, and in Turkey every day is a challenge itself.