I searched for a bed like this but didn't find anything I liked that was well-built and affordable. So, I'm building this one out of solid wood for about $450. (Except I had to buy a new miter saw, because my old one was stolen out of my garage about two years ago, so that was another $250.)

Edit:

Here's the Blender 5.1.1 file

You'll need the Measure It addon installed and enabled to see the dimensions. The gray boards are the blank stock pieces I bought. It's in inches, because I'm a stupid American.

Here's a screenshot of the blender file:

Edit 2:

I have most of the pieces cut to size. I've already made a small mistake, but it wouldn't be my project if I didn't. Nothing a little wood filler won't fix. The side walls of the headboard with the angles I'll need to cut with my circular saw. Or, maybe I could do it like this. I'm not sure my table saw is big enough. (Also, it was either woodworker or piano player for this guy, I think he made the right choice.)

Edit 3:

I'm stuck waiting for the Vevor pocket hole jig I ordered, and the bed rail hardware. I didn't get the Kreg, because it's plastic and more expensive than the more versatile Vevor jig.