I want a good milk cow.

For milk, choose Sahiwal, Gir, HF cross, or Jersey cross. First milk the cow in your presence, then do a CMT test on all four quarters, and check the lactation month. If you want fifteen liters or more every day, one cow will not stay at peak for long, so plan two cows with staggered calvings. For a cow above fifty thousand rupees, take a Pashumitra or vet along.