Day 1: Leaving home late night like 12Am and reaching Mingora same day and over night stay in Mingora
You should stay 1st night between Mansehra - Besham, no need to go to Mingora as road wil be same after besham, either from Mansehra or Mingora.
Day 2: Leaving Mingora and reaching Hunza same day (dont know if its feasible or not)
You can reach Hunza in day light if start early in the morning
Day 3 & 4: Hunza Valley/Sost/Khunjerab and sorroundings
GOOD
Day 5,6 & 7: Not decided yet, confused about Skardu and Astore. Will any of these be accessible on car?
You can also visit Ghizar and Astore by car.
Day 8: Heading home back