Bro,
The thing that confuses me is you are saying Pakistan does not have $2-3 bil for a project but on the other hand you are saying China can give the J-31 or J-20 with TOT.
What we have been discussing in the last few pages is that PAF would like to have a single engine 5 th Gen fighter along with a multi-engine 5 th Gen. These aircraft could be a mix of western or eastern. I had suggested that if PAF could some how invest and proceed with the TFX single engine design then it could save a lot of research cost which is going to be spent on the current TFX multi-engine fighter aircraft.
It was also reported that PAF is considering the J-31 and there is also a possibility of a 5th Gen single engine designed by CATIC.
Both these projects can be made to work if Pakistan is able to get some king of soft loan because in the next 5-10 yrs the economy of Pakistan would be improving.
Here again you are saying that PAF should be considering 6th Gen platforms. We all know that 6th Gen aircraft are nothing more than drones. Now the argument of having a pilot or not is for an other thread.
Having both these together is also not a problem and 5th gen are not going to end any time before 2050.
Till that time live in the moment