Background:
I have my Bachelors in economics from a major state university. My undergraduate GPA is about a 2.7 with various C's, D's, and F's. I was a terrible student and don't have any valid excuses for my grades.
Fast forward a few years and I've gotten my act together. I have my MBA from a well-regarded state university and my MS in applied economics from a different mid-level state university. This time, my grades are much improved: I have a 3.6 GPA for my MBA and 3.8 GPA for my MS in applied economics. I have earned A's in calculus I - III, discrete mathematics, linear algebra, and differential equations.
Situation:
I loved my applied economics classes so much that I'm considering going for my PhD. Given my really, really poor undergraduate performance, I'm concerned that I may be locked out of any decent school. I don't have any delusions that I can get into a top 10 or perhaps even a top 50 program. All I want is to get into a mid-range university that has a decent applied, developmental, or public economics program. I'm leaning towards continuing to work in the private sector while teaching at a local university or community college at the adjunct or part-time professor status at the same time.
If it would help, I can take multivariable calculus, real analysis, etc, before applying. Do I have any chance at all? Should I even bother with a PhD?
Thank you in advance. This forum is an absolute treasure.
EDIT: My GRE scores are Q750/V780/A5.5.