2 consoles. 1 gold account?

You would need at least 2 subscriptions for 3 consoles. You can only share gold on 1 console at a time, the Home console. So if you have Account 1, Account 2, and Account 3. Account 1 could have gold and sets Console 1 as it's Home console, all 3 accounts
can share gold on that console. Account 1 can then sign into any other console and still use gold because it's tied to that account. Account 2 or 3 would need to have gold and set one of the other consoles as their Home console in order to share gold on that
console. Then either of the 2 gold accounts can use the 3rd console.

No, you only need one account to have gold. Account 1 should have Gold, and have one of the consoles set as their home console. This will be the console Account 2 uses, as it will now be able to use Account 1's gold.

Account 1 will sign in and play on Console 2.

You would need at least 2 subscriptions for 3 consoles. You can only share gold on 1 console at a time, the Home console. So if you have Account 1, Account 2, and Account 3. Account 1 could have gold and sets Console 1 as it's Home console, all 3 accounts
can share gold on that console. Account 1 can then sign into any other console and still use gold because it's tied to that account. Account 2 or 3 would need to have gold and set one of the other consoles as their Home console in order to share gold on that
console. Then either of the 2 gold accounts can use the 3rd console.

Thanks for your reply. Do I understand that I will have to re-purchase content for simultaneous games on consoles 3 or enough to buy 2 Gold subscription as you described?

Ok first to explain it

Lets call the primary account account 1 with gold and games and dlc

And the second account account 2 that wants to play coop etc whatever

Console 1 is the home console

And console 2 is visiting console

Console 1 Account 1 makes console 1 home and both account 1 -2 can use dlc and gamea and gold on console.1

On console 2

Account 1 must sign into live to use dlc and games at all times

Account 2 does NOT have gold on console 2 as ita on console 1 you have a limit of 10 switches per year gamepass isnt shared only the gold part of ultimate is with one gold only one can be roaming

Keep in mind an profile can only signed in on one place at a time so there Must be two profiles for them to play together

It's essentially the same, let me try to explain.

You need 1 gold account for every 2 consoles.

Let's say you have 4 consoles. With 4 accounts. You make 2 gold accounts, and 2 home gold consoles with those accounts. The gold accounts play on the non gold consoles and they get their benefits because they are gold members. The 2 non gold accounts play
on the home gold consoles and get the benefits because it's a gold console.