I am planning too this. My general recommendation is a plugin-based system. A lot of business just offer the same product as a SaaS or with integration just ins

I am planning too this. My general recommendation is a plugin-based system. A lot of business just offer the same product as a SaaS or with integration just installed (like HomeAssistant which offers SSL certs for Alexa, or HelathChecks.io which offers Whatsup/Teams integrations). Most of the Cusommers didn't care self-hosting, if your SaaS price is decent. I strongly do not recommend to have two copies of the codebase, because it increase the sync time (like bug fixing portings, for instance). Sad to say, consider protecting you from AWS/GCP/etc reselling as a service