I knew a professional GM that would come to your site and run a module/AP of your choosing for your group. He made a real production of it with Dwarven Forge and Syrinscape. It was never clear to me if he actually got enough bookings to make a living though.
my Realm Works videos
https://www.youtube.com/channel/UCZU...4DwXXkvmBXQ9Yw
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