I have had a lot of info on the show about fodder systems, including DIY and commercial systems. The cost has run from a few hundred to many thousands of dollars.
I wanted to start feeding fodder to my birds but could not see making a large investment to essentially sprout seeds. People all over the nation spout seeds for their own use with a jar that simply has holes in the lid. I have done this and it works just fine, I figured a 5 gallon bucket is just a big jar right?
So I made my own system based on the vaulted 5 gallon bucket, it would cost you at max 30 bucks. Honestly I have less than 20 dollars in mine by using stuff we already had on site. I just wrote an article about it that also has a ton of pictures and a great video. You can find it at BrinkOfFreedom.net.