First of all, check out the blog
https://www.mbaover30.comThe biggest thing you need to ask yourself at this point in your career is: "Do I need an MBA?" If you're satisfied with your career trajectory and can promote without it, and MBA may be unnecessary.
Generally speaking, people get an MBA to either change fields (like me, military --> brand management), enhance their current career (common in consulting), or to get into the business side of their field (i.e. an engineer who's looking to go into technology management).
FWIW, I did 10 years in the military, am over 30, but think the MBA is worthwhile since I see it as the perfect complement to my leadership experiences in the military, which will open up a world of opportunity as opposed to military-tailored programs corporations have that tend to pigeon-hole veterans.