How do we know if we are on the right track on developing a new site?
I would like to get a rough estimate and roughly predict on how much the site will earn in 1-2 years or basically how much traffic I can expect from a search engine such as Google if nothing goes wrong.

So far the site is almost 5 months old and receives 80-110 referrals/day from Google only. Google Image has not yet indexed any image. However, I do hope and expect to receive a decent amount from the Image section because of the number of photos I have uploaded. I update the site every 2-3 days and the site currently has over 2,000 pages (the number of pages include ~ 1300 pages of images alone and the rest is context).
I buy traffic on a daily basis and bring in around 1,000 unique visitors/day. So overall the site has roughly 1,400 unique visitors/day including Search engine traffic and direct visitors and other website referrals.

The first 5 months I was able to receive ~ 100 visitors/day from Google. How does that compare to your traffic for your new site?

Am I on the right track and could I expect to receive 3,000 visitors/daily within 1-2 years? Has anyone experienced similar data?