My opinions:
1. Yes, if you meet either during or after the ceremony.
2. I would check the VJ timelines. It could take a couple years after filing the I-130. Average time, according to data gathered here on VJ, is roughly 625 days from filing the I-130 to visa in hand.
3. You don't need a great deal. 10 or 12, imo.
4. No. The best evidence is that evidence of time actually spent together.
5. Read the guides for tips and processes.
6. No, unless exceptional circumstances.
It will, likely, take more than a year just for the I-130.
Other members might have different opinions and answers.