Is there a way to subscribe as needed?

Hi, 

I use InDesign sporatically (probably two to three times per year) for projects (posters, newsletter, ads). Is there a way to subscribe to InDesign as needed? I'm paying $33.46 per month for a subscription. Is anyone aware of a "pay as you need" way to use InDesign? I've tried using Pages or Microsoft Word for these types of projects, but I much prefer the array of capabilities offered in InDesign. 

Thanks for suggestions.