You can convert most of the pour over espresso machines to plumbed in by installing a mini float valve on the cover over the water reservoir.
Kerick Valves make these and they are about six bucks apiece.
Check it out at Kerick Valve
http://www.kerick-float-valve.com/ The model you seek is the...
Many coffee nuts have humdreds if not thousands invested in coffee brewing, roasting etc.
It would be interesting to know how much coffee the average Joe drinks in one day.
I drink about three cups made with a French Press when I get up and later in the day a few espressos and a Cappacino or...