Not sure what you mean by "risky." If you wish to apply for COS, you can and like any non immigrant visa, you will show strong ties to home country.

It is recommended to file Supp J for each subsequent job. An approved Supp J is required to adjust status if working for that employer.

Not sure what timeline you are expecting or if she has travel plans, best to work with a counsel who will advice you every step of the way.

Yes, it is possible to file. Details to be discussed with attorney filing the petition.

No, however it can be denial if marriage is not consummated.

Best to seek guidance of attorney with full knowledge of facts and filings.

Residency is to be maintained. Apply Reentry permit. However it can still result in abandonment of residency depending on personal factors.

I-485 is filed for candidates in the U.S. She will consular process. For quotes on attorney fees, call attorneys directly. It is not discussed...

You will need to post reason(s) for denial.

No restrictions on number of employers and hours