security issues with Net Meeting?

My company is going to have one user working remotely. We looked into VPN, and the costs of implementation and support seemed unreasonable for only having one user on VPN. Someone suggested trying NetMeeting, and having one workstation at our company’s location set to allow the remote user to take over control of the desktop via the internet. The product will work perfect, but I am concerned about security issues. Can you give me suggestions as to how to make the workstation at our locationsecure so that no one else on the internet can take control of the workstation, and thus have access to all of our companies resources?