Vortex In my imaginary scenario, it would be just a minimalist backend that ties Enhance to Stripe (or, better yet, Paddle).
I think, if I had to make up a scenario, that I would be using WordPress as a website to present the plans, features, pricing, documentation, blog, etc..
The pricing table buttons would be linked to the buy links from Paddle, the backend (your dash) creating the organization, and package in Enhance after payment, sending an email with the password to the client or just SSO to Enhance. Client should be able to upgrade/downgrade, pay invoices, cancel service, the basic stuff. That would be pretty much it for the backend, for me it doesn't need to do more.
I would use Fernand for support, which already integrates with Stripe/Paddle/Lemon Squeezy.
That's what I can think of right now, on the top of my head.