No, it's not possible to install a rear AC in Mahindra Bolero because the car does not have any space from where you can set the vents for AC on the rear side of the Bolero.
The Mahindra Bolero is priced from ₹ 9.79 - 10.80 Lakh (Ex-showroom Price in Pune). To get the estimated on-road price of this vehicle in Pune, you may click on the given link for the price details.