mightyb, are you me? lol. I have an undergraduate in econ too and I'm potentially going into a masters program (Wake Forest) in the fall.
I did exactly what you are thinking of doing; took an Abnormal Psych. course at a community college while working in finance (thanking the gods everyday for being out of this industry!). I have since reenrolled as a full-time student, and I'm taking a number of base-level psychology classes while working in a research lab.
So yes, this is very realistic for you. I had great grades like you and my GRE wasn't horrific. I think if you have some kickass (academic) references and a refined and research-directed personal statement, you'll have a great chance at getting into a masters program. I think it's also possible to do classes and work in a research lab for 1-2 years and then go directly into a PhD program. But from what I've heard about the dreadful Clinical competition, it seems like a masters under the belt may fare well when application season comes around. And this is only my current line of thinking right now (I have gone back and forth on the options as I'm not sure there is a better one). Also, maybe research into both Clinical and Counseling psychology PhD programs. I believe Counseling programs prefer more field experience while Clinical wants researchers, researchers, researchers. It sounds like you enjoy working where you do, and you may be benefited by staying there if you apply to Counseling PhD programs.
Hope this helps and best of luck. Cheers!