Wedding Invitations

I have a question on wedding invitations. Planning our wedding for Aug. 23, 2003 and my fiance workd as the director of a adult care facility where he has been the director and the person whe runs the house with all the assisted living residents since the facility opened five years ago. My fiance has grown close to many of the people who have loved ones who live in the assisted living apartments. We were wondering if it would be good ediquete if we send wedding invitations to all of the families who pay for their loved ones to be in the adult care facility or would that be incorrect. We do not socialize with any of these people outside of a professional work enviremant. Could you guide me to make the correct decision. These invitations would intale 35 wedding invites. What is correct and how should this be handled? Julie