You prob would want to DIY this. There isn’t a reason to limit yourself to only keyboards with injection molded cases. Ultimately anything kit-based will be as sturdy, and having QMK support is, imho, a must as you won’t be dependent on the manufacturer’s software. Also a point of consideration is whether you’d be limited in terms of switches. Idk if those boards allows you to buy a switch-less board.

I had Kinesis Edge and stopped using it pretty quickly after going the DIY-ish route.

Plenty of boards you can buy that would only require you to add the switches, which is a fun part.