I just finished building mine from those plans and ended up spending around $400 on everything. My local methanol supply only sells by the 55gal drum @ $300 per so that will be one of my biggest costs. I have a few supplies so far but need to find some more to make it a viable cost saver. Good luck and remember the appleseed plans are just a guide, figure out how you want your plant to run and design your plumbing to fit your needs. This will save you some time in the long run.