Depends what you're budget is and also how scientifically you want to approach this. Anyone can throw compost in a bucket and add foods and aeration. However, there is a lot more to this process that involves a multitude of variables such as amt. of aeration, quality of compost, size of mesh bag, nutrients for the microbes, etc....
If you want to do it yourself and test it, this can get quite expensive. I think your best bet is to look for a commercial maker who has already done the testing for you. A good starting point would be http://www.soilfoodweb.com/03_about_us/approach.html