Hi Sanjoo,
The project cost for setting up a milk processing plant depends on various factors like cost of land, site developments, plant and machinery, labour cost, contingencies etc. SO these are variable factors accoding to the location and the area you would want to start a processing unit. If you have these details please approach the nearest National Dairy Development BOard. The concerned officer tehre will provide you with the project cost and details.
Regards
Ashwini S