Jumptree is a web-based software, which means as long as you have IIS server (which should come with Windows server or even Windows XP), anyone from anywhere can access the application.
In addition, a full SQL server is NOT required. You can download Microsoft SQL Server Express Edition
which is free to use.
If you go this route, please contact us first because as of V1.3 SP2, we will have to give you the database file for you to use. In the next release, the installer will be able to walk you through it.