Determination of site development time

In the relationship between developers and customers, determining the time of creation and the price of a project is of great importance (this is a web development). For definiteness, we assume that the payment for the development of the project is hourly, the programmer determines the rate himself.
So, the customer asks you how long will this job take you? Naturally, time depends on the complexity of the project (site). Then, again, for definiteness, suppose that the site should have the following standard functionality today:
- user registration, e-mail confirmation, login / logout, account setup;
- the site contains content: articles that can be added by the administrator or user, as well as edited and deleted;
- the list of articles is displayed on the main page;
- each article can be commented;
- administrative interface: managing users and articles + statistics of visits and viewing.
- all forms with validation of the input data;

Site Requirements:
- design - minimalistic, without graphics;
- Work in browsers IE6-7, the latest versions of FF, Opera, Safari;
- LAMP platform (PHP 5, MySQL 4);
- it is assumed further development of the site;
- it is possible to use frameworks

Question to the habr visitors who are engaged in web development. How long does it take you to create such a site? What tools do you use to increase development speed - increase your competitiveness? Time is indicated in hours. It is also interesting to hear the opinions of developers on ASP.NET, Python and other platforms.