This question is tricky, and R20, R14, R10, R13, R11 and R1 all have good, valid points.
I am one of those people who never should have gone to B-School, mainly because I was unclear about what I wanted to do after. But I had the grades, got the GMAT score, got in to two top programs and felt a lot of pressure to go. So I did.
Big mistake. I wanted to drop out after one semester cause it felt so wrong, but I already felt too invested in that point so stuck it out. This just brings more credence to the point: it's all about the needs of the specific individual. An MBA is not a guaranteed career-maker for everyone, nor is it detrimental to all. Given your background, OP, it sounds like you're a strong candidate that would find grad school useful.
Because MBAs are a dime a dozen now, the most important point to reiterate (from previous posters) and consider: Choose your program carefully.
Go to the best one you can. Do your research and be selective. There are the top 20-25 programs, which have already been mentioned, and then there are the top schools with very specific specialties that are considered leaders in their respective fields. More than the information you learn (which does not have to be learned in one of these programs), the most important result of B-School are the contacts you make (both fellow students and alumni) for networking purposes, and the success those schools have with placement. Graduates who get hired by recruiters while still in school have significantly higher salaries than graduates who go out and get hired on their own.
One reason so many MBAs are worthless now is they're offered at every school, including all these online programs where you literally might not meet a single person as you study. What a disaster.
Geography counts too. If a certain region of the country has more opportunities for what you want to do, you need to go to school in that region if you can. Doesn't always make a difference, but helps a great deal.
Be ready for it. OP, sounds like your finances are still in a bit of disarray, or at least were. School is not the place to fix what ails you. It's grueling and all-consuming. Couples who were on shaky ground when they started school divorced. (In fact, all but two people in the program who were in relationships ended up getting divorced. And they were both Mormons, for what it's worth.) A few had nervous breakdowns, or drug problems.
And yes, snottiness from those who don't have the degree is everywhere, partially from the insecurities of various people in power positions, but also because the MBA mills have absolutely manufactured far too many degree holders, making the diploma by itself rather worthless.
Finally, on a personal note, though MBA school was not a good fit for me, I did finish. Didn't help me in the slightest with my career cause I changed career paths almost immediately after graduation, but I cannot fault the school for that. The irony of it all is that I am one of the best-known graduates the school's ever had, just in an area for which the school can't take any credit.
Best of luck to you!