If you get a barebones board with a hotwap PCB you have to screw in stabilizers for all keys larger than 2u (=2 keys) - Shift, Enter, Backspace and Space. Since you can’t be arsed, screw lubing them. Just screw them in, takes 3 minutes.
Then, place all the switches on Plate and PCB and since they’re hotswap you just press them in.
Then place like 8 gaskets or screws, drop on your PCB-Plate-Switch-Sandwitch, screw together top and bottom with 4 more screws.
When you’re done, mount the caps, also just pop them in place.
That’s it. I reckon it’s about as much work as a 10$ Lego set.
But going prebuilt is far easier of course: Unpack, plug in, done. If you get a hotswap you can change switches later on if you fancy.