And, going back to read the original post, nowhere does Lou say anything about entry level anything. Based on the initial post, he wants to build a bookshelf speaker to complement the tower speakers he already makes. I seriously doubt he's gonna start using MDF or 'cheaping out' in other ways in order to hit a price point.
I've seen Lou's speakers in person - they are freaking works of art. A big part of that is because they are made out of 100% natural wood. And he has a level of performance that matches the beauty of the woodwork. I suspect that quality of that level simply can't be done for less than $5k or so. Which means, if you want an amazing, reference level bookshelf speaker in both sound and appearance, you're gonna have to pony up the $$.
I think it would be quite silly for Lou to come out with MDF (or baltic birch) based speakers, when his reputation is built on his amazing real wood cabinetry.