If you need updates more often than once a week, you're going to have to take a different approach, since OSM only publish their database exports once a week. In that case you're going to have to use the OSM API to query their database for changes directly and it is only reasonable to track and manage continuous updates on a relatively small surface area.

All of this is of course ignoring the fact that there can be a time lag of anything from hours to decades between a house being built and that house being added to OSM.