No as long as legally obtained it should not be a problem.

Yes that should be sufficient if requested.

Best to consult with an attorney to discuss your options. Good luck!

You should answer no based on information provided.

Contact the court directly to inquire about lost document.

Visitor visa may be the fastest route.

You should indicate where you will receive your mailing.

Depends on the length of marriage at the time of your admission.

The petitioner must still file an I864 regardless of income.

No unfortunately this is not an option.