As you might have some sensitive information, my suggestion is to consult with an immigration attorney in private.

It is possible, and I am including a link for your...

If your wife can show she has intent to return to her home country after taking her exam, she has a chance to obtain a B-2 Visa Stamp.

Sometimes going to another Social Security office might be helpful.

Frequent travels by your B-2 Visa Stamp may subject you to further questions (inspection). Also, please make sure that you properly returned to...

Please refer to the link below for your information. https://travel.state.gov/content/travel/en/us-visas/other-visa-categories/transit.html

Please consult with an immigration attorney in private for available options. You might want to consult with an attorney in your country about...

My suggestion is to consult with an attorney who has expertise in both property laws in your state and immigration law.

As long as you do not engage in employment at the restaurant & as long as you continue working for your H-1B Employer, you may run the restaurant...

As you have an approved H-1B Petition by Employer A, you could be questioned about it when you apply for an F-2 Visa Stamp.