If things burnt up due to short circuit, means engine bay and main wiring harness also burnt out? Have you replaced them?
Without proper circuit diagram and ECU pin outs, the best thing your electrician would do is burn/damage some sensors and/or ECU. So your best bet would be to find someone already familiar with QG's wiring. If you can't find anyone in your city, you'll have to sort it out with Pakwheels member's help. People are here to help, but it will be very time consuming for you and need lot of time and effort on your part.
70K price for engine only is on much higher side (compared to Rawalpindi).