I have many nice diy Ortho boards for at home, but at work I have a computer I do CAD on. Because I share this machine and use the numpad a lot, and decided to just get a full sized board. Ordered one of the cheap ones with low profile choc switchs from Amazon. Since then I ordered an ISO layout TKL for my wife, and a 65% for my gaming PC. They are the definition of "good enough". For around the price of one high quality board I now have 3 boards that have been getting daily use and are still "good enough" years later.
To also add, my wife cannot really feel the difference in her cheap low pro, and my lubed Planck. Her only feedback was "Ortho is hard for her, but it looks cool".
My only suggestion is to ease newer users. If she is used to her GMK67, make sure the layout is the EXACT same. Some smaller boards do weird things with the right shift and arrow keys.
I am not sure exactly how that kit goes together, but you can really use anything non conductive. If you take the back plate off you can use a vinyl sticker/tape of any kind. Once you put the back case back on it would do a nice job form fitting and staying even after the tape loses its stick.