Current deliveries are still getting 7 kW chargers along with 2 kW charger but they keep saying there's no guarantee when 7 kW charger could stop. If you don't get a 7 kW charger, you don't need to buy a charger from BYD. You can import from AliExpress under 1 lac. If you are a low mileage driver, 2 kW charger can work for you as well.
Registration cost in Islamabad is between 280,000~290,000. Keep in mind 270,000 is the advance tax and 10,000 is the income tax. Both of these taxes could be adjusted in your tax file returns. If you are a salaried person, you could get it adjusted from your employer. The rest of the remaining amount is minimal, around 10,000.
If you don't have solar but still want to own an EV, I highly recommend you install a separate single phase meter for EV charging only. You will save around 40~50% when compared to fuel costs.