I have recently done a TON of research on this topic.
It would first depend on why you originally had to have a C-section. In my state there is actually a law for hospitals: once a C-section, always a C-section, which makes it impossible to deliver safely in any hospital for v-Bac.
I had 2 vaginal deliveries, a c-section on my third due to placenta previa, a v-bac at my doctor's office, and then another C-section due to placenta previa. I am going to shoot for a Vbac2c this time. The reasons why I had the C-sections where not because I was incapable of delivery, since I had already proved that I could easily have a regular delivery 2 times before my first c-section.
Maybe you could give me a few more details about your first delivery so I can help you out a little more? What kind of incision did you receive and why did you have to have your C?
The risks of a c-section are more than a vbac, or even a vbac2c....if you are able to deliver vaginally, but that's hard to tell if you've never done it before. The biggest concern that I would have would be vbac with induction which has a higher percentage of uterine rupture. In the case of uterine rupture, there is only a .07 percent chance of rupture, and the study was not specific as to who had had successful previous deliveries and who was induced. So it would be even less of a chance of something going wrong for instance for a person like me who was not induce and had had successful deliveries before.
With a C-section, there are many different complications that could happen with any surgery, plus extra strain put on your uterus so that if you decided to have a third child you could be at risk for many things that you wouldn't have otherwise. Not to mention the recovery time is a real pain! And you don't want to have that with a toddler in tow.
If you want more info, I can get it for you, or if you have more specific questions, I will be happy to answer them.