Choose a sport that you can make a proposal for a business plan for a new facility for that sport

Let’s say you have an entrepreneurial spirit, and want to start a business. Choose a sport that you can make a proposal for a business plan for a new facility for that sport. What are some of the elements that you might need to take into consideration? Location? Needs? Staffing? Money? What are some of the elements you would need to consider to even begin to put together a business plan?