If SketchUp were able to make it so that we could have many people building on one project at once from around the world and it should be free.
There is a free version of SketchUp already.
Or are you talking about a free version of SketchUp Pro?
if we could use sketchup and build a thing with other people
and it should be free
I think he is requesting a network collaboration version. Moving this to feature requests.
@Ninjaknight2NK, You might want to try Trimble Connect extension which is specifically designed for collaboration. http://extensions.sketchup.com/en/content/trimble-connect-sketchup
This is possible now with:
The Trimble Connect extension for SketchUp provides direct access to projects, models, and other features of the Trimble Connect platform. Create a model in SketchUp and then Publish to a Project and share with team members. Import a model into SketchUp to use as a reference model. Pull in changes from collaborators as needed. Make changes and re-publish your model.