Brother it is better to spent 25K more than to install AC from a local workshop. Why to open each and everything and do experiments.
After fitting AC mechanic will start doing Hit & Trial to improve its cooling.
And after everything fix, then start visiting everyday to AC workshop for different issues, sometime car's over heating while AC is ON, sometime pick problem.
So better to buy a company fitted AC car to avoid all such problem in future.
Its just my personal opinion.
@TAUXEEF...All the best whatever U decided, its ur own choice.