Its easier said than done. How can 50 cows give profit in 7 figures?
Firstly, dairy practices in Sindh and Punjab are quite different. Feed generally in sindh is "WANDA" and in punjab, "HARI GHAANS"
Talk about local cows/crosses.... one piece costs around 120K, whicch is a "TAAZI" unit (on milk). Feed would generally be around 400 per day... Average milk produce from a 'good' cow in Sindh is about 7 SAIRS per time, means 14 SAIRS. Sells at year-long"BANDHI" rate of about @Rs.50-52. Be sure to include Oxytosin costs in this as well....
Another point, if you have 50 cows, half of them would be producing milk at once, remember the cow's cycle.... needs to get pregnant, then wait, then delivery, then after some time taazi becomes baakri.
hope this helps.