Only you can answer your own question as it depends upon your individual circumstances, finances and long-term goals.  I would suggest you decide what it is you want to do with your career, jobs, etc., and then determine if an MBA will help you achieve these goals.

A job+MBA may be a real win-win, but once again it depends upon your circumstances.

Others can give you lots of freed advice, but ultimately you need to make the decision that makes the most sense to you.

Good luck.