[robocat]

Your calculation assumes an overhead of zero: for example you assume that knocking on doors takes up no time.

Plus: is knocking on doors obsolete? I'm not sure you'd be able to get a response in my suburb (not that I've tried - too many gates - too many suspicious people).

And prep, traveltime and cleanup all take time too. for example a mower doesn't magically get to a house and it needs time and expense to run (and where I live you'd often be expected to dispose of clippings - costing time or money or favours).

Trite answers are cute, but they are not helpful.

[elmerfud]

I did mention it does depend on location, which you just ignored. In your paranoid neighborhood maybe not viable but that's not most of the USA. I mentioned this from practical experience, not of me doing it but of hiring people this way.

There's an aging population that appreciate this because not everything is on an app. Really just seems like the fear of hard work.