Bimmer, Avis prices are WAY out of tune in pakistan. Avis is simply charging their international rates in an economy where private rental firms are half the price. Id suggest you look around for private firms, there are numerous - and they are as reliable and safe.
In the past I've gotten a Corolla with driver for 1,800rupees a day. And if you give a month long committment the prices can go down to 1,500rupees a day.
My problem this time around is, i've got 4 full bodied adults with me. I just need to find a SUV's daily rates.