I have a model in the Mesh Editor and I would like to add a point to the model that I can reference in the game in order to attach an object to the model at that point. However the model is not animated and does not have a skeleton. Is it possible to add a single point only, or do I need to build a whole skeleton for the model just to add the point?

One point is enough (but it will be saved in skel as well).

you can't add a point to Mesh, but you can create skeleton only with 1 SkelPoint