See this article: https://www.bizfilings.com/toolkit/research-topics/managing-your-taxes/federal-taxes/startup-costs-a...
Since it appears that your business didn't "open its doors" until 2017, any capital equipment purchased before the start of the business is considered a personal expense until "put in service" at the start of the business and depreciated as used equipment. The monthly subscription service, if used to help investigate the viability of starting the business would be a start up expense.
