To bypass an ISP you would have to connect to an Internet Exchange Point. Connection would normally be by ethernet. It would also be prohibitively expensive as you would pay the same fee as an ISP does annually plus a setup fee. The fee is fixed as a usage based fee would be a disincentive for growth.
The hardware and software costs would also be high as you would need access to name services and you would also be responsible for onward routing of any packets destined for other users.