Whiskeryron,
I don't know who you share your phone line with, but you can share the broadband between you both and all your computers.
Having two phone lines and two broadband providers will be a complete waste of money.
You could share your broadband service, and the cost, with the neighbours if you wanted. I mean, to put it in perspective, a business will run all its computers from one phone line. They don't have a separate phone line for every computer on the Internet.