Alot will depend on the individual set up of the BC you've chosen. Some are very tightly controlled and bound by restrictive policies, others have much more independence.

The BC in Brisbane for example (we only have one ) is inside the hospital maternity ward and is quite tied up in hospital red tape - it doesn't take much for a woman to get booted out and back into the regular system.

You'll need to talk with them and ask them about their exclusion policies to find out what your risk is of ending up back in the system. Then you can decide whether that risk is acceptable to you, or whether you want to look at other options.

GL