Read "The Ranidae: How to breed, feed and raise the edible frog" by Unknown online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
This, of course, depends largely on the circumstances. If you have abundant means and delight in some hobby and want to make a fancy proposition out of it, why you can make your ponds as expensive and picturesque as you wish. But for those who wish to make a business for the benefit of the income to be derived, should start with a small pond and about six pairs of Frogs. Then gradually increase your breeding pond as your stock and ability to handle it demands. Don't start with Frogs under four years of age. They will be the cheapest in the end.