I think that in house means that the coaster just keeps going in circles and doesnt extend outside the first big circle. I'm not sure if that makes any sense at all, it's just the easiest way I could explain it.
Top 5 wood-5-Goliath 4-Ravine Flyer II 3-Phoenix 2-Voyage 1-El Toro Top 5 Steel- 5-Velocicoaster 4- Maverick 3- Fury 325 2-Steel Vengeance 1-X2 Coaster Count: 444