In Europe or america climate is relatively cooler than Pakistan even then, no car is manufactured without AC because it is considered necessity not luxury. Unfortunately it happens in Pakistan because we buy 1 million worth car without Ac,
Our problem as a nation is that we confuse safety features with Luxury items.
Anyway back to your question, A person buy a new car so that he gets full support from manufacturer. If you install Ac in it, your car's warranty will be voided, no one will listen to you in case anything happens. Moreover, Ac needs to be optimized, in case of 3rd party installation, it would run continuously and affect the pick and mileage as well. So, It's better to sell it and buy new VXR, Or sale it and buy JDM alto, don't go for any alteration. Rest is upto you.