How to build Priority Support in Zoom Phone

Our SaaS business is selling priority support for our enterprise clients.

We have an IVR set up with Sales & Support keys. 

I would also like to have the possibility to have a priority line, "skip the line". Are there ways to build this?

A few ideas that crossed my mind:

1. Have a call queue (or shared line group?) with an Extension number; pass that extension on to the client. They can enter this in IVR instead of choosing a key. Then they are routing to the Seniors in my team dealing with enterprise.

2. Have a dedicated phone number that is not published on our website. Can I have 1 call queue/team that is fed by 2 phone numbers, where 1 phone number takes priority over the other? 

Additionally, if the customer would like to stop using the Enterprise packages, ideally I would also like to remove their access to the priority line.