I do think that phoenixd, or another with a similar set of features, can be a great low-maintenance wallet for self-custody. This is what I am using. As it's a server, it can be available for payments anytime and provide LN address, zap, NWC and other features. Channels, automatic backup and incoming liquidity is automatically handled (with a fee), thus minimizing maintenance and setup time. Also the hardware requirements are minimal.