I'd say adjust the time on it. 3 hours isn't a lot of time to build something good. Maybe adjust it to 4/6 hours.
the server's not 24/7, I can only host it in the day. On the weekends I host from 1AM to 11pm. That would mean that only 3 themes could be hosted in a day, a fourth one only half-way hosted. Note I'l be adding more themes, so I'l have to reduce the time to 2 hours. If it was 24/7, you'd only be able to join certain themes when you're awake, because other themes would be on when you're asleep.