Financing A Land Purchase

They say the root of all wealth is in land, but is that really true?  As a potential buyer I wanted to know if financing a land purchase would be good for my portfolio and decided to check it out with my calculator.  I first averaged out my current investments.  I assumed a 10% average on the retirement's accounts and stock market over the next twenty years as well as 3% on my savings. Next I used a property for sale in Arizona to calculate the land values for the last twenty years.  It was an increase of 20%.  Finally I had to consider the interest on financing a land purchase which can vary greatly depending on who the seller.  I found a company selling the above lots at zero interest (www.sunsiteslandrush.com).  I could not believe anyone would offer real estate today for no interest and no money down so I had to check them out.  They were a member of the BBB, Arizona Chamber of Commerce and several other organizations.    In the end it makes sense to purchase land as part of my investment portfolio and I choose Sunsiteslandrush.com because of the great zero interest offer.