I thought I was asking a simple question. I had no idea there was much to consider! I bought a small electric kettle and 3 different small packages of Starbuck's instant coffee pouches (medium, dark and, I think, special blend). We'll see if it gets used by my next guests. I also put a covered pitcher of purified water next to the kettle so they don't have to use tap water.
I've decided I REALLY don't like the smell of coffee. I'm hoping the instant will reduce the smell some.
Thanks, everyone, for your input. I'll return to this thread in the future if I want to tweak the newest decision again.