Can I get a complete list or directory or website that list angel investors, venture capitalists, funders etc?

Simple: The right investor is someone who wants to invest on standard terms at a good valuation relative to your current stage. Extra bonus points for someone who has relevant industry connections that could accelerate your business and is willing - at the right time - to make introductions for you. But you should have really quite low expectations of most angel investors. Certainly they should have NO operational control of the business. Although I want to be as helpful as possible to companies I invest in, it's entirely for the entrepreneur to drive me, not the other way around. There are very few exceptions to this rule, for example when angels who actually do have very recent and relevant experience want to back someone who is inexperienced and need oversight in order to feel comfortable investing early. But this is a real rarity. Finally, to answer your question about what entrepreneurs do when they receive funding, they should spend it in the best possible way to accelerate the success of the business. I'd be happy to talk to you in a call to provide more clarity on the matter and also discuss when is the right time to accept investment. If you have people willing to back you, that's great. You want to make sure you have a clear plan and set expectations accordingly.

Find the right investor interested in this area and the answer is yes. investors come from many walks of life and are interested in things just like everyone else. Find wealthy individuals who are open to investing and find your area of business interesting and ideally understand it and could help with it as well.

Wow, sounds like you have an amazing profit margin. The key is GROWTH. Continuous and stable, with the ability to predict future growth. Therefore, your market niche is very important, to feed the growth curve within an order of magnitude and can't be too vague. As others have mentioned, investors look for a $100-200 million valuation potential, as well as the ability to morph or expand as needed. Contact me if you want to discuss more.

100M+ in revenues in 5 years or less does not happen very often. As an example of one sector, here is an interesting data visualization (circa 2008) of the 100 largest publically traded software companies at that time that shows their actual revenue ramp-ups from SEC filings (only 4 out of these 100 successful companies managed this feat, which themselves are an extremely small percentage of all of the VC-funded software companies): How Long Does it Take to Build a Technology Empire? http://ipo-dashboards.com/wordpress/2009/08/how-long-does-it-take-to-build-a-technology-empire/ Key findings excerpted from the link above: "Only 28% of the nation’s most successful public software empires were rocketships. I’ve defined a rocket ship as a company that reached $50 million in annual sales in 6 years or less (this is the type of growth that typically appears in VC-funded business plans). A hot shot reaches $50m in 7 to 12 years. A slow burner takes 13 years or more. Interestingly, 50% of these companies took 9 or more years to reach $50m in revenue."

I took a quick look at 500px who reported 1.5-million users in 2012 (source: Techcrunch http://techcrunch.com/2012/11/28/gorgeous-photos-in-your-pocket-500px-arrives-on-iphone/) with 10% as professional photographers. The article also mentions monthly growth of ~100,000 users. If your targeting the same market as 500px, use their reported numbers to back-up your assumptions. I'm sure there are other services who target the same user community - I'd spend some time collecting this type of data. Is your service designed only for professionals, or would you see a semi-professional (part-time) and advanced home-user?