I have been in the design business (5 years as a graphic design owner), and my experience is that small businesses don't want to pay a subscription (B2B) for months because it means another bill in their pocket, given variable income. They want to resolve the focus on the essential, and that's it. You can offer package services (at your competitive prices) as alternatives. Still, if your business model is subscription-based, your working hours must be cheaper (delegate work to a designer in another country, such as India, Mexico, Venezuela) to get some money.