This looks exactly what I started building awhile ago (and then bailed when I discovered Foundry). Do you think you'll ever release the code so it can be self-hosted?
I've toyed with OSS'ing it or releasing the code. It would be a non-trivial amount of time and energy to package it in a way that people could host it. Gamescape was a hobby thing so I used some different architectural patterns I'd been wanting to experiment and play with that aren't totally standard.