You have a very difficult series of decisions to make, not knowing your personal life, Married with Children, or In Laws, overpriced home / apartment / condo, etc ... The unstable economy, the Maya calendar, (Only 1,436 days , 3 hours, , 21 minutes, and 20 seconds left until Galactic Alignment!) New President in The U.S. Barack Obama, democratic dominance, Israel in the Gaza strip killing Hamas terrorists, and so forth and on and on... basically, it's a tough road to work the Economics Field while working towards an IT degree. I don't think an "on the job training" would do. Best case scenario, your new company pays for your IT training as you continue 40 + hours Economizing, and you finally get enough certifications and degrees to move into a fairly decent position.
You've had experience with PCs, but do you have any certs or anything that proves you know how to open control panel, and use all the tools? Or run mmc.exe and know what you're doing in console root \ computer management?
Can you produce documentation to prove you're experienced in PC's to get a job driving VW's for "Geeks R Us?" or whatever they are called? Probably pays 7-8 $$$ an hour to start if you're A+ certified? Just guessing, might be more.
Any relatives in positions who can pull strings?
At what point in your college time working for your economics degree did you feel compelled to go into an IT direction?
Most likely, too late in the game to change your class structure, if not even before college. OK, knowing the past can't be changed, you will most likely have to use your degree in economics to live on, pay bills, and as you say, take classes - MSCE or Cisco Server certifications that guarantee you job placement after passing the many levels of "climbing the knowledge ladder", to get to your destination. But caveat time...
Don't let people fool you into thinking a MCSE cert will get you a high paying job, with opportunities for advancement. Monster.com, and / or "Post your resume here." websites are overflowing with qualified, and even worse, overqualified engineers who can code in 6 "languages" that used to be grabbed up in minutes after posting. Times have changed as you are well aware of. A very sad situation for some who invested years of their lives only to find the doors closed because of qualifications and expectations which managers will anticipate you will require big $$$, so they say"thanks, and we'll call you if we find a good fit for you"
What field of IT do you want to go into? Can you use your degree in economics in conjunction with a computer related job? Perhaps, if you are interested in ECommerce? A little google search brought me an interesting page loaded with IT info, which may help you decide how to merge your Econ-degree, or make enough to move on next graduation.
If you want 1 view of many, "Top 10 Computer Program Majors",http://www.degreetut...puter-programs2
has more info than my soggy sponge of a brain can absorb, but it's a good start for you to see trends of computer related career moves, and also learn of the online programs w/degrees, so you only make 1 commute a day, to the economics based job you will hopefully will find quickly, that pays the bills, as you move at your own pace, through your home computer(s) to your next goal. And continue your voyage on the "permanent learning curve" making choices to go straight, right or left as you become the IT specialist in the field of (insert choice here), and make lots of money (hopefully 6 figures) to pay the tuition fees, or student loans, or rich relative(s), or Guido, Mario, Tony "The Bruiser" Gardiino, and the family.
I wish you the best, however it works out!