Set up an instance for the RoCur. It can be just an admin, and a host (which is what I've done here.) But it could also be more than one admin - and a single host account. Admins can use 2FA, host just gets password, admin can stop host deleting account - it's all coming together what you can do on an instance when you scale DOWN.
The challenge is getting the interest to have people host for a week, and move on - but I've seen that on the other side, too.
Let's see how we go.