It depends on what your resources will allow, what sources are already in place, what they are eatingand their daily range...most deer do not travel 5 sections every day, so I wouldn't want less than 1 water source per square mile...especially down there where it may be pretty arid. Evaluate your habitat and come up with a good management plan. It will help you save money in the long run. There are plenty of professionals that will do a very good job too...and we enjoy it!