The Area being Modelled is :- Customers and Enquiries
Barry,
I like the info you have on your site and I am not hung up on one schema or the other. 
What I am looking for is to have a schema that has at least 30-40 tables, and be able 
to fire a 100 or so queries on it, involving multi table joins, subqueries, nested 
subselects, aggregations etc.
What would it cost to do this, assuming an hourly rate