The first step to building a niche website empire is keyword research, this is a critical step which will determine whether your website does get to page 1 of Google. There are many different ways to monetize niche websites and the best way to do that is by using Google Adsense. Niche websites which earn well with Google adsense can be sold for between 10 - 20 times what they make monthly on websites like Flippa. Monetizing with Amazon is also great, there are many products which they sell so finding a niche to target is easier. If you build a number of these small niche websites, you can make alot of money but make sure that you've done proper keyword research.