Working for a relative means there is no or little payment involved? Choose the most generic hosted solution. If reasonably successful, which might be any profi

Working for a relative means there is no or little payment involved? Choose the most generic hosted solution. If reasonably successful, which might be any profit like 2 sales per month, it will need to run for years. As a developer you don't want to receive emails about the system being down, acting weird, special feature requests, warning messages about outdated modules. Long-term that will consume your time. It's fine to invest time for the initial research, setup, design, but ideally it will run automated from then on.