I am starting a new project to run though the web. It will be an extranet with an average of 100 transactions per day. It will be used by 10 users. In a few years the sponsor of the project hopes to integrate this application with others institutions, which diffent platforms. I am not sure if start the project using PHP or ASP.NET. I have no experience with them. One of my evaluation point is the hosting which is most common for PHP application with MYSQL. What development tool should I use?