Do Your Homework!
For this topic has two meanings.
1. Do your research on Golf/Teaching Professionals in your area. We all have a short bio or background information that gives insight into our experience and knowledge of the golf swing. And don’t be afraid to call the Golf Shop and ask the staff for their opinion on specific teachers.
2. After your lesson(s) spend time working on what you’ve learned. If you take a lesson and don’t take the time to practice what the Golf Professional has taught you, during your next lesson it will be a lot of repetitive information.
In the end, spend what you can afford or what you feel comfortable spending. And definitely take more than just one lesson! I promise you, there is a Golf Professional out there for everyone no matter ability or financials.