Joseph,
I think you can get Aplio phone with Ethernet Aplio Pro, you will need to units, all calls placed between Aplios will be FREE there is no charge.
You will need to have static IP from your DSL provider.
http://www.aplio.com
I think this is best way to save now. You can take Aplio with you anywhere and just connect it to Internet and that’s it.
Regards,
Alexander