If you hire taxis point to point and call radio cabs every day then it really depends upon which company you call and where you hire your taxi from.
If you have the money then hire a taxi for the whole two weeks and it wont be more then I believe Rs30000 including the fuel and driver. That would work out around $450 all in. This is for a mid sized car but if you want a bigger car then it would cost a little more. My calculation may be a little off but it cannot be too far from reality

It is in that range.
If you dont want a taxi for the whole duration to stay with you then you could use radio taxis within the cities which cost between Rs15-20 per KM.