Incredibly confused on user accounts, primary vs. secondary, and virtual game cards.

Hey all. So I have a switch 1. My husband just got a switch 2 that we were originally going to share but decided that it would be easier if each of us just had our own consoles as we’re often wanting to play at the same times. So I am logged into my old switch 1 as the “primary console” for my Nintendo account. I am logged into my husbands switch 2 as a secondary, and he has his own primary Nintendo account set up on the 2. He has 2 games on there that are virtual game cards from my Nintendo account (leaf green and Nier). When I get a switch 2, I am going to transfer my profile and everything from my switch 1 and no longer use the switch 1. We did not do this with his switch 2, as i didn’t want to lose the data on my switch 1 as I was still using it. I have so many questions and I am so confused. If anyone can help I would greatly appreciate it!!

1. When I transfer from switch 1, will all my save data go to my new switch 2?

2. Will my husband lose access to my virtual game cards? I will still have his switch 2 as my secondary.

3. Can he play the two games already on his switch offline? Since they are VGC from my profile, if he is not on wifi, will his switch not be able to verify those games even though he’s on his own primary Nintendo account?