Suspension on an aluminium frame mini bike
is no deficit.
(Scroll down to RHM's Post)
(pic by RHM from the Pootle Thread)
People do quite long distances on them as you can see. Opinions on hub gears seem to differ wildly - some say they're more suitable for dusty conditions, and keeping grease off fellow commuters - others prefer the ease of maintenance of dérailleurs. Your choice. If you're commuting you may need to bag the bike anyway.
Also see the 16" wheel Dahons, there's plenty of quality choice there too.