2 Nintendo Switch with the same account and profile?

My son has a switch with his mother and here with me (father) also a (disconnected) now I wonder if he needs all games now twice, or if he bought games in the e-shop on both consoles (at her and with me) can play, including memory levels. So 1 account, 1 user on 2 consoles.

In addition I ask myself the question whether the bought on-line membership can be used on both devices. Unfortunately, I can't find anything specific about it. And while you're at it, can multiple users of a switch be linked to the same account? So the switch with me 1 account 4 users. Can everyone have their own saves, play the same games and also use the booked simple online membership? The family online membership is indeed for different accounts, but it would be so in our case, only one account needed or?

That would work. The son simply needs to log in to the 2nd console with his account from the other console and then he can re-download his eShop games and take the storage data from the cloud if he has the online subscription.

The only thing you have to keep in mind is that you always need an internet connection on the second console so that you can start the games from the 1st console at all.

Maybe it would be best if the son just uses a console and always takes with him?

The take away would be bad, as he drives to me every day after school, that would mean he would always have to take them to school. Unfortunately that is bad. Is the online function bound account?

If he has the single membership for $ 19.99 a year, he can do that with the account on both consoles just as I've described. But as said before one of the two consoles will only play games when the console is connected to Wi-Fi, not anywhere outside or in the car (at best with a mobile phone hotspot)