Lobelia Tincture Making or Buying

I have a pretty good case of Asthma. I recently purchased from Dr. Shulze's site, his Lung Remedy tincture, which is mostly Lobelia. So far it has stopped my asthma attacks in their tracks. Unfortunately it's a bit too pricey for me to buy on an ongoing basis. I bought a couple of months worth at first to be sure it keeps working. Does anyone know where I can purchase Dr. Shulze protocol tinctures at a lower (discount) price until I get up the nerve to try to make one myself?

Anyone have experience making their own tinctures? Dr. Shulze style? Is it difficult if you've never done it before. Should I just follow the directions and give it a shot? I've heard Pacific Botanicals is a good source for high quality herb.

Thanks for any advice,
Curious Jane Tweet