I just built a pretty basic 60% board (my first one) using a DZ60 PCB, cheap plate from KBDFans, cheap doubleshots from KBRepublic, basic coiled USB-C cable, and a bamboo case that I liked. Total was around $190 not including all the soldering stuff I had to buy.
I have a history soldering so I wasn't too scared to jump into that, but even without a history soldering I think you would be fine, PCB's seem to be pretty forgiving.
Hot swap boards are going to put you over the $200 budget would be my guess.