I've seen this occur multiple times to my own startups and in my consulting business. Investors come in all shapes and sizes, and at varying times throughout your startup. Whether the first customer or the lady next door, true investors believe in your vision. That being said, no business ever succeeded without customers. I believe your priority should be on exceeding your first customer's wildest expectations. Deliver your product to solve their problem first - and do it well. Investing is secondary and will naturally occur if you succeed on making them a loyal customer. A very common problem for entrepreneurs is to get easily distracted away from building your business and customer base. Capital will always flow to successful businesses. Please call if you would like to discuss this, or anything else, associated with starting your business.