I would like one of those but 1 cup per day max doesn't justify it.....does it ??
Depends what you mean by justify, purely monetary then maybe not, but.....
My Gaggia Classic cost £120 second hand, they're around £460 new, in absolutely tip top condition, my grinder was £240 new, and I've now started buying beans from a local roasters that average about £8 for 240g which lasts just over a week making two double espressos a day.
If I was to buy the same amount in a high street cafe at £2.50 that's £35 a week so I'm saving £27, it might take a while to get back the initial hardware costs but it's worth it to me to be able to have something at home that's better than anything in the shops.