I wanted to check if this was still going to happen.
In another thread, they determined that Chanhassen, MN hadn't given the green light for Paisley Park to open as a public attraction, and that it wouldn't be open during JNUC:https://www.jamf.com/jamf-nation/discussions/21525/no-approval-for-museum
I believe they did eventually get permission. I got an email from them and they appear to be selling tickets:
(I don't know if there's a group organized for it or not though)