Customers want them. More customers will want them as the word gets out about their growing popularity and about their cost-effectiveness. Perhaps you should think about getting into the banner business in general and the big banner business in particular. Big banners are practical to make. While they are durable, big banners tend to have a relatively short life span.
Events change, prices change, promotions change.
Once customers get into the big banner habit they tend to need a variety of them over short periods of time. That means repeat customers. Repeat customers mean more business and more profit. You don't have to give up your craft and art if you are a purist. You do not have to retire your sophisticated software if you are a modernist.