Hmmm, Pretty much any machine takes approximately the same amount of time to produce a decent cup of coffee, whether it be siphon, french press, espresso, Moka, perculator, drip, instant, etc. give or take a minute or two
Heck, for most of the non-espresso kinds of coffees, they take longer, as you need to not only heat up the water, but wait for the coffee to drip through the grounds/filter/what have you
The only one that seems to be quicker then Espresso is Turkish, Or instant.
The only suggestion I would have is "get yourself a machine that can do both steaming and extracting at the same time" Now, I know this isnt a downgrade, but if you can pour and steam at the same time, that usually cuts down the wait time between both. saving valuable time
Short of that, Theres always a Super-auto or nesblech-o/other-capsule coffee which may cut down the time at the critical hour at the expense of things like taste, quality, etc. ;)