If he used another name to enter the U.S. then he used another name.

It would be a good idea to get a joint sponsor for your affidavit of support. If your income is based on your unemployment, it may not be persuasive.

EB3 is not for unskilled. It is for skilled, requiring at least two years training. But meanwhile, if you are qualified, the employer can file...

Since a person can leave the U.S. multiple times when they have an approved I-131, having one does not prove that one has maintained a U.S. residence.

You can try both, they are not mutually exclusive. You might as well try everything you can.

My understanding is that revalidation is where your visa is expired and you are returning and you get admitted on the revalidated visa that expired.

If you are filing for adjustment of status and your wife is in the U.S. in legal status, she can also file.

I do not understand how having an approved I-130 demonstrates where you are living.

Yes, you can return home while the i-140 is pending. If the employer withdraws it, you will need to find some other way to return to the U.S.

That's about all you can do. You can ask them to reschedule if they schedule your oath ceremony.