Hi, I'm a developer with more than 30 years of experience, twenty of those employed in-situ by two international organizations. I have deployed many application developing MSI installer projects (many of them including MS SQL Server engine installations). I'm sure I can help with your project, but we would need to discuss further your requirements; e.g. do you require web installation/downloads for the SQL Server and IIS components?, what kind of web service are we talking about (ISAPI DLLs, ASP.NET based?, etc.) Also, there'll be dependencies that need to be taken into account, for example, .NET framework versions, etc.
If you think you may be interested in my services, please open a chat, I can provide a CV (with verifiable references) and we can discuss these issues.
best regards,
Marco García