I have a 9yr old ecom website, that's losing to Amazon. I signed up for a $35K FBA Store training org, that's a one lifetime fee. Can I amortize it over how many years?

I have a sole proprietorship and have 2 e-commerce websites since 2008. Sales increased every year until the last 4 years, it has declined.  I think it is due to Amazon's dominance.  I signed up for a  $35K training package with FBA Stores who train and coach members to open and maintain successful Amazon Seller accounts.  This $35K is a one time cost for lifetime training, which equates to as long as they are and we are still in business.

Unfortunately it has been a huge loss for so many people, and Amazon is now suing FBA Stores.  In the meantime, I am out $35K. 

Is there a way, like amortizing or depreciating this FBA Store training package?