I'd think of "this-one" and "that-one" as speaker style, kind of like Yoda's backward-talking which probably wouldn't be an impediment to reading. Might even offer some characterization. (I think there was an alien race in one of the Star Wars Expanded Universe novels that used those pronouns, in fact. Can't remember which race or story, even, but I remember the style of speaking.)

That would work much better than words I've never seen before and would have to learn the meaning of as I go. Like others said, the work involved might make me give up more easily than familiar words used in a different way, like this-one and that-one.