I'm tired answering questions of this type: 'how much I will be making after year of kick ass working?' or 'How much traffic or how much sales a day I will generate after specific amount of time?'
Here is the tool (beta version) where You can count it:
http://www.jammycash.com/mybizplan.php
You have to think properly about input parameters to get valid results. Important are all params, try playing with lifetime of the site, etc.
livetime 600 days means that after 300 days is site getting 50% of hits from the beginning and after 600 days is site without traffic, etc.
Tool is applicable to freesites, blog spots, tgp galleries, etc.