> I think that's a great set of choices. I wish more webware were organized like that

Agreed. This is the way forward for most software monetization (in case of web applications): Have a FOSS licensed application, where you can pay for a hosted version. I think this is a fair model where you pretty much outsource devops for the software to the company who builds it.

If you want to self-host it (maybe legal or security reasons), you can do that without cost or hire their consultants in helping you doing that.