Thanks a lot for the answers. I am checking now your instructions and see if I am able to build a transaction offline with them.

On the other hand, I was able to restore my wallet using the caravan online service for a test wallet I am using. I just added the xpubs and M out of N parameters,  and automatically it showed me the balances and addresses I had in my wallet.

https://unchained-capital.github.io/caravan/#/

If Electrum stops working, I can just use Electrum offline to build the wallet and sign the transaction. Then I can broadcast it with another wallet. Am I correct?

Also, shouldn't I be able to build the same wallet in another software wallet that allows multisig for BTC?

Thanks,

Thanks. Keep in mind I want the instructions to be useful in a long period of time (i.e. 5 years) without having to use the wallet.

When you setup one multisig wallet in Electrum, cosigners will need to store some information to build the wallet. Each cosigner will store their seed and passphrase, as well as the instructions for the wallet recovery. The ones they should be storing are:

1. M out of N signers.
2. Cosigners xPubs.
3. As some cosigners use a hardware wallet, their derivation path close to their xPub.
4. Electrum version used to build the wallet.
5. Remember the fact that in Electrum the cosigners are organized in lexicographical order. (In case they want to rebuild it later with something different than Electrum).

Would this be enough for recovery? Am I missing any parameter that might be needed to rebuild the wallet in the future?

Thanks,