An approach I did sometime back was to create a generic template kind of an app (in code not published) for B2B that had integrations with ERPs where the bones

An approach I did sometime back was to create a generic template kind of an app (in code not published) for B2B that had integrations with ERPs where the bones were finished but the UI was pretty bare so it could be customized for each client and be deployed as its own app each time. I had built up this toolkit overtime and it got more profitable and easy as I went. I could easily tailor it to clients so it was very branded and unique but yet the bugs and time to complete was very low in the finished product. I still get paid for this monthly even though I'm doing a startup and have moved on. It still pays the bills. Everyone's experience is different. I had an advantage of niche ERP integrations that pretty much no one else did and could sell it way lower than the competition. This is just a hindsight thing and people tend to fool themselves that their decisions were correct but in reality I got lucky in my approach and got lucky I had flow of people that gave me referrals. Find a pattern that works for you but gives you some clear advantage.