That wasn't my experience. The grinder and espresso machines I used just needed rinsing between cups and a quick scrub at the end, plus cleaning the water tank

That wasn't my experience. The grinder and espresso machines I used just needed rinsing between cups and a quick scrub at the end, plus cleaning the water tank once a week (depending on water quality, tap water is gross). Moka pots are a pain to clean though, but you can buy a huge one to produce a large quantity.