1. It would be kind of cool if they discovered the small town itself was some kind of portal to a fantasy realm. Or that it was once tied to some kind of magical place where runes were once mined, assuming it's a small town with old mines and stuff. 

2. Young adults, like 20-23 ish?

3. Okay, I just wanted to check. Some people want to stick around a certain range and when I've done more, they've dropped out without trying to make things work over something that can be changed.