If you are already tired with the same career, then go and look for a better one. Buying degree can help you because that is one qualification you need when you apply to better jobs.
How can you increase your salary if you don’t even upgrade yourself? Buying degree will help you. If you have additional degree, better position will be given to you.
It’s a domino effect. Once you have a degree, you gain more confidence, you apply to better jobs or you become promoted, you gain more salary and have enough income to support your family. Eventually, you become successful in life.