I started in a similar circumstance; I had a business degree with a less than stellar GPA. Due to GPA screening, most MD schools won't look at your application unless your cumulative GPA is a 3.2, and I think almost all of them screen a minimum of 3.0. Some DO schools might take a glance, but your odds are basically nonexistent (especially if you aren't a URM) if you can't get it above 3.0. At that point your only realistic option is some postbacc programs (with guaranteed medical school seats based on performance), but that's extra time and more money -- obviously not ideal.
One thing you NEED to prove while you take your prerequisites is that you can handle a heavy science workload with high performance. With a business background they don't have much to go off of, so it is absolutely 100% necessary that you don't score anything lower than an A- in your o-chem classes. If you do, you better be SURE you score an A in Biochemistry or you won't be taken seriously. Adcoms look at our applications with a skeptical eye, so if there are any holes in it they will find them and use it as a reason to dismiss us. We start this process handicapped, fair or not.
Of course, the MCAT is another area where there is no room for error. I'd say to even think about applying to DO schools you're going to need a 26+, and don't even look at MD without a 30+. I highly recommend devoting a full 3 months to studying for it without working, if you can afford it. Without a background in science, trying to study for the MCAT while working full or part time is just not realistic.
I wish you the very best. I'm sorry if this seems a bit harsh, but it's important to approach the situation realistically and it helped that I had people willing to explain things honestly to me. On a positive note, I can tell you with confidence that your medical school future is very possible.