[@Zenn] My thoughts are that the family used to work the lumber mill for a long time in the past. Due to the increasing demand of lumber, they got rich enough to simply run it. This led them to get very arrogant and change their family name to Arcio, flaunting the strong backing of Arceus in the region of Kanto. Ethros caught wind of the legend of Rayquaza and has decided to find out answers before deciding which path to walk. I think it'll match up well with the religious theme of the RP. 

Also, I'm thinking the main part of the Arcio house would be here: [img]http://puu.sh/gi0iV/9baa5a08b0.jpg[/img]. Just to the west side of the south entrance to the forest.