When the bitcoin prices rises, we can adjust the prices when denominated in bitcoin. That's the cool thing when it comes to a deflationary currency like bitcoin. 
Have you looked into these options to run a Hub? https://guides.getalby.com/user-guide/alby-account-and-browser-extension/alby-hub/alby-hub-flavors
or you find someone who creates a subaccount for you on their own Hub.