Even 20 billion dollars is a huge figure. Yes, even if you put tons of ammunition in it, it is a very big figure. Turkiye and TuAF has an established F-16 industry. There is already a logistics system that has been functioning for decades. One of the largest non-US production bases is in Ankara. Both TAI and the Air Force have had an institutional culture for decades, from routine ground services to depot level maintenances. Moreover, we have one of the most advanced F-16 test squadrons outside the US and we are capable of conducting advanced integrations. Work workforce, there is an extraordinarily experienced ground crew that has been able to bring back to life even aircraft such as 88-0033 that were deemed impossible to fly again. It goes without saying, there is no problem in terms of training, infrastructure and documentation if we talking about F-16s.
Then what is the budget of 20 billion dollars? The only possibility I can think of is that we have been subjected to a heavy embargo in recent years, which has really strained the existing F-16 logistics. So it's not just for 40 new aircraft or some upgrade kits, but huge logistics procurement that covers the entire existing F-16 fleet.