My plan is drawers and I didn’t think far enough in advance to pick slides and add holes to the CAD. I will get that done before my next few.
It’s 18mm plywood.
If you assemble your lr4 with a lot of care you can get enough quality parts out from it. I started with a lr2 and in matter of months was making good enough projetcs that decided to sell them. I make mostly strore facades in acm (not a cheap material, also mostly never i end up redoing work so i dont loose sheets other than user error). A lr4 is a LOT better machine than what i started with.
You will find yourself into the struggles of improving your cad/cam portion of the job to fully take advantage of the machine.
Of course a 4-8k usd “hobby machine” can doit too, a 15k+ cnc is on another level but i cant justify the expense right now while the benefits for a bigger/better cnc are almost marginal in my use case.
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Any more updates? 
I’ve been traveling so not much time to work on it. I did cut some more parts but ran into issues where they didn’t seem square (which also explains some issues I had assembling the test cabinet.) I tried to square it and ran into another issue: LR4 Squaring Issues.
I’m trying to fix this, then I’ll probably replace my table (to test Torsion LR4 table generator and stop dealing with chatter), then get back to cabs.
I think that CNC, even a DIY one, can greatly help in all cabinet-building jobs. Especially now in this day and age, when most manufacturers have 3D models of their parts.
You will be able to position the part in your drawing and just transfer the holes from the part to your panel, then you will be able to save the hole patterns as blocks for later use. After some time, you will have your own hole pattern library of parts you use the most.
You will be able to cut fluid-shaped (curved) or be able to produce cabinet doors that do not have a straight line in between them, but a wave or similar. Cutting an exact shape for a sink and other utensils, or cutting them in by leveling the top with the surface, is just another thing that will be much more precise for you than for someone doing it by hand.
The other thing you will be able to do is personalized carvings on front panels or some other pieces.
One problem you might be facing is professionally gluing the edge bands on melamine boards without an automated tool that gives consistent results.