You can make a fogger for about $45 and this one hold over a gallon, so you dont have to refill it every other day. I made one and use it at my work, like grif said on a timer, and it works great and I only have to fill it every week and a half to two weeks. Here is the link to the video hope it helps
How To Make Your Own Reptile Fogger!- Classy Herps - YouTube