Many small businesses don't survive, especially in turbulent times.
Once you've established your business or have it at least running; you will probably have a catalog of your products and services. This would be what brings in the majority of your sales or business income. Besides your "bread and butter," consider adding multiple sources of revenue related to your business. Or, "spokes on a wheel."
Passion alone is not enough for an entrepreneur to succeed. Capital funding secures the resources needed to fulfill the business plan requirements. There is no shortage of alternative and traditional small business funding sources that can leveraged. Savings, Banks, Crowd Sourcing and Fundraising are few ways to raise capital.