Buy a ready made website
Buy the ready made websites from the web and just handle them and maintain them though they might be very costly.But if you play with mind and caution you can get a good deal.Before purchasing the website you must consider following things in detail along with site monetary value.

1)It should be not against the adsense or your revenue providers policy for example nude,or warez,hacks etc.
2)Check the websites content and theme sometimes theme of site can lead to less return back from what you have provided.For example you can look at the meta tags,descriptions.
3)Check the website traffic – You should check its traffic through online resources such as quanticast.com,alexa.com and the compete.com these three can give you and real idea of the websites traffic you can also use google trends >>> websites button to know more if the site is more popular or not.
4)Check back links in yahoo site explorer.As this will be and addition to your purchase also check its quality.
5)Look for full site transfer along with database so that users of site don’t disturbed away while transferring.
6)Deal with caution and pay 1/4 money before and 3/4 after the domain and site transfer-ration.If the seller is local it is better to meet and talk to him personally.
7)Keep your new website updated.
Some calculation you would like to do
It is a well known fact that you should invest that much that you can get return back along with profits.So we take here the cost of website as the total cost of outflows for you.Now if the website is already earning a good amount of money then your inflows or the income will start soon otherwise just consider the Present value factor in mind and using them to further conclude to the real cash outflows now deduct the total cash inflow from it this will give you an estimated profit from your new project.
In simple words
Total cash outflows – Total cash inflows = Earnings
Sources which might help in buying a quality website :
1)sitepoint.com
2)forums.digitalpoint.com – beware while dealing

Nice tips, nice article!
Thanks for sharing – p.s the pig is cute!