The basic Nonimmigrant Visa Waiver is all that there is.

It should not be an issue that one of the last three years his income was too low.

It should take about three weeks. Contact customer service.

Contact the government agency that has it and ask to extend it.

Normally it is required, but USCIS may accept your I-94.

You can certainly apply. It really depends on the individual program in question.

No. If this is related to future employment for your career, it would constitute unauthorized employment.

You can port to a new employer if you are in the U.S. Perhaps you are asking if he is subject to the numerical limitation. Since it is six years...

Yes. You may need to contact to consulate to get them to reopen the form to allow you to edit it.

If you are filing from outside the U.S. you submit the fingerprints form with the application. Otherwise you do not submit it at all. They will...