thank you so much guys for answering my questions. you really helped me a lot. by the way, i do not grow them, there's a forest near my house where my family and i harvest it. i'll try to make a website and post the photos of the reishi and me. i'm 22 years old and its my first time to start a business, so if anyone is interested to buy, just contact me, we could even chat in skype for better communication 
Please watch that video, Paul stamets and the future of fungi. Its 80 minutes that will open your eyes to why what you are planning on doing is so so important. You didn't choice this path, its chose you and I wish you all the best. Look up the wolves of cynobyl too which shows how the mushrooms are creating diversity even where we thinknits impossible. The only thing we destroy is ourselves, the world will be fine.
Mushrooms grow on rocks absorbing minerals causing he rocks to crumble to soil. I'm sure you know the storey from there ;-)
Thank you so much Siddhartha, i am inspired by your words and i will continue my goal until i establish a stable business. I am looking forward to provide it to people with a reasonable price because i believe that health is very important and it should not be very expensive. by the way, i live in the Philippines and the conversion of usd to php is big that's why i am thinking to sell it at a lower cost so that it will be affordable.