Hi Brian,
I've not seen the plan so cannot say for sure, but I suspect given the size, the interlocking nature of the parts, together with the precision needed, it would require very skilful work with a scalpel.
But when you buy the kit, you are not just playing for the wood and laser cutting process, you are also paying for the time the person who designed it took to develop the idea, presumably through several prototypes, and to eventually finalise the design and put it on paper.