Misting System?

I am gonna cross post this in a few forums to get more suggestions.

I want to make a homemade misting sytem for my future Grotto. How can I do this cheaply? They cost WAY too much for me to buy an already made one.
I'll want a very very fine mist- not a gushing flow,.
You know how Scotland looks early in the morning with the mist through the trees? This is the effect I want. :-D.
(on smaller scale no doubt,lol.)

Any suggestions? -Thanks!!!