Very much diy but this kind of layout from Weteor ticks a lot of your boxes.

https://github.com/weteor/ChonkyKong

Let me know if you need guidance on getting from the GitHub to an actual physical board. Soldering will be required (which I always encourage because I find it fun) but I recognize not everyone has the time.

Link your board and folks will be better able to assist. The switch type makes a big difference for stem and height.

Mokulua kit from mechwild probably your cheapest option. It's a solder kit and all through hole, I built one myself and had fun. It's fr4 sandwich so on the cheaper end, though depends on what you're used to. Soldering is fun!

I was most surprised by how I became emotionally hooked by this novel rather than intellectually (if that makes sense) - I wasn't as into the world but more the people, which is rare for me in a sci fi/fantasy novel. What a heartbreaker.