baleno has a piston compressor which is a workhorse, in my car its working for almost 19 years now...n i only got AC serviced 1 time in 167k mileage, that too when i shifted from serpentine to mf condenser...
u wud be needed additional brackets, adjusting wheels belts, also wud be altering refrigerant pipes etc, i dont think it wud be a big difference in cost...
imagine installing 1 ton ac unit in 15 x 15 room