Second, my post in Message 49 unpacks this a little. You might want to check it out for more context. Briefly, the Big Banger (because he/she pre-exists time and space) is best thought of as non-temporal, eternal. Therefore, he/she does not need a beginning or a factory.
This thread is growing faster than I can keep up with, so I may be (probably am) repeating someone's post, however...
I don't know why it is "best thought of" for the Big Banger to be non-temporal or eternal. Does anyone know anything about things "outside" the Universe enough to make this claim? If this Big Banger can be non-temporal or eternal, why can't the Universe be non-temporal or eternal, which would obviate the need for the Big Banger?