Aeropress is probably the most compact option and is easy to clean and use. It's downside for me is choosing between a tiny cup or adding water to a concentrate. My wife uses it every day, but I don't think it gives a great cup. Chemex is great, but the one I've seen most is better for bigger batches. And you'd have to clean the pot. Clever dripper would be my recommendation here. No clean up, easy to use, without the size limitations of the aeropress, and you don't need a gooseneck kettle.