Instead of running both Bitcoin and Lightning nodes, the alternative is to run complete side chain business? With PnLs and all?
Discussion
Just one node, bitcoin, with an account on a sidechain, self custody the whole way including a sidechain seed if need be. , or no account at all because transactions are routed through lightning on the sidechain (working title is thunder, read the drivechain FAQ)
E.g: bitcoin spend with receive address info -> sidechain -> receive address.