Over 21 unmarried child: what if USC sponsor not in U.S.?

[princesskate]

This is my concern of my friend who is an over 21 unmarried child of a U.S. citizen:

His mom (when she was still permanent resident) filed I-130 for him (he was on F-1, never out of status) in 08/2001, it was approved in 2005 but he is waiting for priority date becomes current in order to file I-485.

He's applying for H-1 this year, at the same time his mom (who is a USC now) is considering going back to the home country. Would it be a problem for him to apply for I-485 when the priority date becomes current? Does his mom need to be physically in U.S. when he files for I-485?

He is making enough money... can he become his own financial sponsor on his green card application?

 

[LucyMO]

I don't think she needs to be present physically when he files I-485 (I wonder if domicile rules applies in this case), but she still needs to be his sponsor (I-864) and he can be his own co-sponsor, but specific rules apply for that. It may be easier to find another co-sponsor.

 

[princesskate]

I think I didn't make it clear. My friend's mom is considering moving back to her home country to live permanently. However my friend has been living here for over 7 years and planning to stay here permanently.

Would this cause a problem on his green card application?