Take a role of an architect in the Ancient Egypt and fulfil the missions from your Pharaoh. You are always put on some part of the land where is needed to build different houses. To see them click on the Goals button. To build different homes you need builders and they aren't cheap. You deal with auctions as well. If you want to build a house you need to own a parcel. Watch the actions and buy when the trade looks cheap. Then invest the money, it takes time to get them back. Some city organizations will help you giving you some houses for free. Each house can be upgraded but maximum is three ugprades.