Home Assistant Cloud for HA in two houses

Hi everyone,
Newbie here in community and somewhat newbie for HA.
I have HA installation in my house and use paid HAC subscription for backup and remote access.
But I have second house, in which I also want to deploy HA.
Now, I already know from here:

as well from this old post here:

that I would need to have two HAC paid subscriptions to be able to remotely access HA deployments in both houses. But I have these questions:

  1. Would I need to have two separate Nabu Casa accounts? Or just one with two HAC subscriptions tied to it?

  2. If I need to have two Nabu Casa accounts, then how would that work in an HA application on my mobile phone? Would I need to sign out from one HA and sign in to a second HA to be able to acces it remotely? Would I be able to receive notifications in HA app from both HA installations in two houses simultaneously?

Apologies if I’m confusing things, but I am really HA newbie.