We have a very nice 1960s ranch ... but... it takes a full 30 seconds for the hot water to reach the bathrooms. This is a single floor layout, so a recirculating plumbing stack for a multi-story building wouldn't work. The plumbing is exposed in the basement, so it is accessible. Aside from installing instant water heaters at the fixtures, what can we do? Please advise, as this is the only big frustration we have for this otherwise charming home we've spent a good deal of effort on.