Your first link is for a bridge. That wouldn't broaden your cell coverage. A bridge would be used if you wanted to use wired clients on your end. The range extender is just a repeater. You could use that if you had a good place to put it, presumably somewhere as close to the middle of the desired link as possible, though it would also be effective closer to the remote side, assuming it was still able to achieve a solid link back to the parent AP. By the way, unless the provider allows this it's a still a minimum, unethical and at most, illegal. I'd read the fine print of the broadband contract very carefully.
And I'd imagine it does make a difference who pays since it's probably not allowed by the provider and the person who has the incoming connection likely would want to be sending in the checks.