I've got a Breville espresso maker (one of their "Barista Express" models) and the boilers warm up in about 20-30 seconds (i.e. by the time you grind and tamp, it's ready to go). It has an integrated grinder (which, once you find the right grind setting, never needs further adjusting), the pour time is programmed, it'll shut off the machine on its own after a bit of inactivity, and the rest of your steps take a couple seconds at most.
I think you're dramatically exaggerating the effort involved in DIYing it, and (done properly) you get a substantially tastier result from the real machine too.
seconded: Barista Express is fast and way better than Keurig. Compared to Nespresso, it's cheaper long run and you can use it for hot water (I'm going to try it as pour over b/c the convenient espresso is making me OD on caffeine).
I think you're dramatically exaggerating the effort involved in DIYing it, and (done properly) you get a substantially tastier result from the real machine too.