I live alone in a 24 sq. metre flat so housework takes about an hour a week!
Walking is wonderful - I usually walk for a minimum of two hours a day, and often much longer. I started gradually, just an hour's round trip, but quickly got addicted to the great feeling of being in the fresh air and getting close to nature. Now, I feel quite unhappy if I can't get out because of the weather - I don't mind if it is overcast but I am not quite daft enough to walk in pouring rain, as the lanes near me would be quite dangerous.
I should add that I live in a small ski resort in the French Alps, surrounded by the most glorious scenery - lakes, rivers, waterfalls, forests, meadows and always the snow capped peak of Mont Blanc glistening in the sun!
I have found walking with Nordic poles a great help - your arms swing in rhythmn and you quickly lose any 'bingo wings' and develop biceps instead! You might get some funny looks, though, if you live in a less isolated spot!
My advice to anyone torn between housework and walking is always take the walk - the dust will be there when you get back with your improved breathing, circulation and heart rate.