Inviting Coworkers

Ok there are two parts to this.

A small part of our team is in the office that I am at, but there is one guy that I don’t work with at all really, and he doesn’t come to the office much. I see him maybe once a month if that, and we just say hi. Since I am planning on inviting everyone else (like 5 people), do I invite him?

I also work heavily with a few people in other parts of the country, do I invite them at least to be courteous? If they were at the same office, I would invite them, otherwise I would feel bad to make them travel. I haven’t met them in person ever either.

We don’t want to have more than 150 show up, (135 or less would be ideal), since we have to spend a minimum of 15k, and don’t want to go over the minimum. So far our list is at about 140.