I still think 3D printing is not really mature and mostly for hobby projects especially with low end printers. (apart from quick spare parts requirements)
So I'd rather consider micro milling machines ( like http://www.pocketnc.com/ ) instead.
Second that. 3D printing -- at least the one you can afford -- is piss poor. A CNC router or micro milling machine will allow you to make precise parts from a wide variety of no-piss materials (including a variety of plastics of course, but also aluminium or titan if you want). That, and it's faster, too.
(Note that 5-axis is actually not needed, unless you want to sculpt a woman's torso or such, you can do just fine with 3-axis. Gears and most other stuff doesn't need 5-axis.)
If you want to be posh, get a CNC laser instead. That's even faster and more precise, but of course a bit more expensive, too.
You might be inclined to say "for a toy it really doesn't matter", and you might be right. But having properly made quality-material parts is
a lot less trouble, both for assembling and mid-term/long-term durability and maintenance.
It's a lot cheaper on the long run, too. 3d printer filament is at least 3-5 times more expensive than the equivalent (e.g. POM) sheet ware.
