If you have a really small office with 10 desktops / laptops, you may consider that deploying puppet / chef / saltstack / whatever is overkill. Walking around with a flash drive is just faster.
But it's not more consistent if you need to change something. Having declarative desired state configuration is useful for any environment, even when n = 1.
I would definitely deploy a configuration management solution for 10 hosts; it takes a couple hours of work to do properly and you can do it without a server initially (though a central server provides other benefits)
