The k-cup is genius. There are 5 people over your house. They can all make a cup of coffee whenever they want. They want more? Just make another cup. They can do it themselves!
I get the joke, but I legitimately think home soda fountains are a great idea. Shipping Cans/Bottles around is wasteful (in weight and in packaging). If commercial ones weren't thousands of dollars, but just a couple hundred, I'd probably buy one.
Something like a Sodastream, but by a different company with real soda in it, would be great.
Plus my experience when I owned a Kurig was not pleasant at the end, with exploding K-Cups.
Even ignoring disabled people, the difference between easy and very easy is a huge gulf.