The crew of Estrellita has a great blog with lots of resources.

One interesting collection is a list of cruising websites they have sourced by cruisers who have reported on the cost of cruising. Not budgets for dreamers or those in prep, but reports from people who are or have been actively cruising. Of course, these estimates are for different time periods, with different boats, in different locations, etc. However a useful resource.

Go to http://thegiddyupplan.blogspot.com.es/2011/04/cost-of-cruising.html