Software Deployment

Hi,

I am going to write a C#.Net standalone application for a client, and I will migrate
it to a web application using ASP.NET and WebServices. Before I make the
decision, I would like to know the deployment requirement for the software and
hardware. Could you please tell me if I have the right idea? And did I miss
anything?

1) Standalone application
- Need to purchase "Visual Studio.Net Profession" to be the development tool. I
think this comes with SQLServer development license.
- Need to purchase SQLServer production licence (Processor License, Standard
Edition).
- Need a server machine to store the SqlServer database. Is it true that if this
machine is in the network, then the client application on users' pc would be able to
get to it?
- Do I need any production license to deploy the standalone application to users'
PC?
- users' PC need Window XP or I will need to deploy the .NET Framework as well.

2) After 6 months, I will need Web support.
- Need Window Server 2003 Web Edition to be the application server (with IIS and .NET Framework). What's the difference between Web Edition and Standard Edition? Web Edition is much cheaper. Can I use Windows NT?
- What is 'Application Center 2000'? Do I need it only if I want to use clustering?
- I think I can install Window Server 2003 on the same machine as the database. But will need to manage security and ports.

I am new to .NET and deployment. I hope I can get some suggestion from this forum. Please tell me if I miss anything or overuse anything or anything to watch for. Thanks in advance. :-D