Every business should have a business plan, and yes, an expert should do it for you. A business with no plan, is like building a house of cards, it all comes crashing down eventually. It's frustrating to see a great strategic opportunity being destroyed with poor execution.
Yes, ideas exist, but there are select pros who know, and could help with crucial stratagems that actually make these ideas tick by writing and outlining for you, a concise and detailed business plan. Let us know if you need any assistance preparing a business plan. We'd love to help!