If cure for tendonitis costs around $3000, then it would not be more $6000 for hair regeneration. I just guess.
http://www.foxbusiness.com/on-air/varney-co/index.html#/v/3775771951001
Here is an interesting paper on Androgenetic Alopecia & AA:
Miniaturized Hairs Maintain Contact with the Arrector Pili Muscle in Alopecia Areata but not in Androgenetic Alopecia: A Model for Reversible Miniaturization and Potential for Hair Regrowth
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3500053/