Once you get green card and work for your employer for a reasonable time (6 months) you can do what you want

If you are a citizen just file for her green card and forget about tourist extensions

It is a one way door - they only care coming in not going out.

Either the sponsor's income is above the 125 percent of poverty guideline or it isnt. If it doesnt meet standard use cosponsor at time of filing.

Work and travel permit is a sign green card has not been fully adjudicated yet. You can inquire with interviewing officer regarding Stokes...

Burden of proof of mailing is on the applicant in any event.

You will be eligible in October 2025. At that point you will have st least years married, 3 years as a LPR and 3 years that spouse has been a citizen.

Your grandmother would need to apply for the visa and you could be the financial sponsor.

You should consult with a criminal lawyer.

You likely wont be successful and will have to file the I-824 and in the meantime will waste time. The I-824 is not complicated for those who do it...