After half an hour or so with Johnty Alouette tonight, I gave Nate at pianolessons.com a go. He doesn't mess around. After the first four minute lesson, I was doing the C, F and G triads, and learned the concept of a root, (the wee dog-like left hand). So I had another half hour up and down the Samson's 49 keys, with triads and roots.
Managing to get an hour in most days is no trouble - Emmerdale and Coronation Street see to that in the week's early evening, and of course weekends are fine.