Two options for funding a small business opportunity are self-funding, such as using personal savings or credit, and seeking outside investment, such as from venture capitalists or angel investors.
The number of months of expenses needed for funding depends on the business and its expenses, but a general rule of thumb is to have at least six months of expenses covered.
The best source of funding for a startup may depend on the specific circumstances of the business, but common options include loans, equity financing, and crowdfunding.