Adult sons/daughters of US citizens are not immediate relatives under current law. They are preference relatives.
Immediate relatives under current law are: spouses, parents and unmarried children under age 21 of US citizens.
Whether you get the immigrant visa after being approved for provisional hardship waiver depends on whether the consulate finds any other reason to conclude you are inadmissible.
You should consult with an immigration attorney for a thorough review of your situation. It would be inappropriate and too time-consuming to do such a review through this forum.
The evidence needed to support claims of extreme hardship are very specific to the facts of each applicant's case, so it is impossible to tell you what evidence is needed to show the extreme hardship.
Yes, the hardship waiver is based solely on evidence of hardship to your husband.
Please consult with an immigration attorney experienced at handling hardship waivers to ensure your best opportunity of a successful outcome.
He will not have to go back to Mexico as long as he 1) files the hardship waiver, and 2) the waiver gets approved.
If you were interviewed at a USCIS office, the officer should have advised your husband to file a hardship waiver and given a filing deadline (usually 30 days).
I strongly encourage you to contact an immigration attorney experienced at handling hardship waivers immediately. The applications take quite a bit of time to prepare. The longer you wait, the more difficult it will...
The approval notice should arrive shortly and will be followed by a letter from the National Visa Center with instructions for the next stage in your spouse's processing. If you complete the NVC paper work with minimum delay, then the immigration interview will probably be in 3-4 months time.
The I-864 terminates under the following conditions:
1) Your husband accumulates 40 Social Security credits
2) Your husband becomes a US citizen
3) You die
4) Your husband dies
5) Your husband's lawful permanent resident status gets terminated
He is eligible to become a U.S. citizen. If he has worked only 1-2 months, he will not have 40 Social Security credits.
You didn't have to fill out any paperwork for him to renew his green card.
A letter is not required because it is too self-serving. USCIS wants more substantive evidence that you have a genuine marriage, e.g. joint residential lease, joint bills, joint bank accounts, joint insurances.
Being married does not bar you from DACA. There is no filing deadline as long as you met the criteria on June 15, 2012.
You should re-consider your husband's decision to not file for you. DACA is a bandaid, i.e. it gets you work authorization and a Social Security Number. It does not give you a green card.
There are good immigration attorneys whose prices are reasonable and who offer payment plans that are affordable to most families. You are not limited to working with an...