lnd VS chantools

Install LND: https://github.com/lightningnetwork/lnd/blob/master/docs/INSTALL.md#install-lnd Install Bitcoin Core: https://github.com/bitcoin/bitcoin/blob/master/doc/build-windows.md#building-with-mingw-w64-cross-tools

To be able to follow along, you must have both bitcoind and lnd installed.

If you want multiple users, you'll need multiple node instances. LNbits (mentioned by /u/sos755) does not implement this. Rather, it simply abstracts the funds associated with a single node into multiple logical accounts. This means that the node administrator still has underlying control of all funds associated with the node. See this GitHub discussion for a bit more info: https://github.com/lightningnetwork/lnd/issues/2652

LND doesn’t use BIP39 mnemonics. https://github.com/lightningnetwork/lnd/blob/master/aezeed/README.md

Both Bitcoin Core and LND have binaries available for macOS, for example. I have not seen an actual guide to set everything up on macOS tho. It's quite similar to Linux honestly.

As for taproot change addresses, this has been the default behaviour since version 0.15.5. Just update your lnd and you're all set.

One of the solutions that seems to have worked for others was to use the chantools tool. The software managed to find a closing transaction but it does not look like the other three and it has an unusually high timelock should I worry about the fact that my funds will be blocked until the end of my life?

You can try purging your graph information and rebuild it using chantools dropchannelgraph

You might find luck using guggero’s chantools https://github.com/guggero/chantools

Not sure if related to your issue, but had a situation recently where I needed to use chantools to recover funds from an "abandoned (by me) and force closed (by peer)" channel. After two weeks of missing funds I reached out the LND developers and they provided prompt and very useful tips for me to understand what happened and recover the funds. Check this https://github.com/lightningnetwork/lnd/issues/5958 and open an issue there if you don't feel safe with what your are doing.

After cleaning up 10000s rebalance transactions from the bloated channel.db with chantools deletepayments running $ lncli listpayments returns: [lncli] rpc error: code = Unknown desc = payment isn't initiated

You can re-create SCBs using chantools https://github.com/guggero/chantools/blob/master/doc/chantools_fakechanbackup.md

Or a recent chantools deletepayments that is supposed to do the same?