wanderingmind - 11:00 am on Nov 14, 2006 (gmt 0)

Adrian,

There is practically no limit to the money you can earn. However, actually having a site or sites that can do it - that takes a huge effort.

If you just want a figure so you will feel motivated - just take a decent job's annual income, and it can be your monthly income. You just have to read, research a lot.