Sustainability is one major perk in business development.
Two years ago I designed an algorithm for start-up time: I defined it as the minimum time required to start making enough profit just to keep the lights on (for some business, 6months others 12months).
Today am postulating that a business that survives for a decade will not go down on customer basis but due to lack of innovation.
10years (the initial slow growth phase) the time to build capacity.
As you sow, do your best to keep the lights on till 2030, afterwards everything becomes more stable, more sustainable and more feasible.