Regarding (3), with LNC the Mailbox server can see your IP address.
Have you seen guides about running LND in Hybrid mode behind a VPS? https://github.com/TrezorHannes/Dual-LND-Hybrid-VPS
I’d echo what DarthCoin (npub1lxk…5xlc) asked — which is the private note? It’s not clear in your note. I assume is the node with just one channel?
