The list of houses are as follows not inlcuding a potential one in alabastra (since I have just arrived)
House of Valor,
All of the stashes are 100% connected. You do not get separate stashes thus the 155 item limit carries to each house. Canneroc is actually the easiest house to fast travel too. Rathir, Adessa, House of Valor, and Motus mining all offer gold opportunities. Canneroc regularly receives shipments of a product that can be sold. Seawatch has the most valuable items form chests, etc,... and is probably the toughest given you have to recruit members to complete it.
SeaWatch also provides an alch trainer if you complete the necessary task.