Withdrawing is withdrawing. It is not a denial. It will not bar you from filing again in the future. You will have to pay a fee if you file again.

I don't see why not. Premium processing times do not include the RFE and response times.

After CIS approves the application you should get it in the mail within about two weeks.

Yes, because you need to be in court and can't do it at USCIS. Depends on the court's schedule, some places could be no difference, but other...

Since it is many years before the visa will be available, this should not bar him from getting a tourist or student visa.

Yes, you can request an expedited advance parole by contacting customer service and requesting an infopass appointment with the local office. They...

It seems to me that if you are selling something in return for money, you are engaged in employment.

If the visa has not been terminated, you file for adjustment at immigration court once he naturalizes. You can request in the alternative to...

If you really want to fight it and try to fix it and possibly go without work for another year, then you should file to get an amended work permit.

You should get it by about March '23.