I know the feeling, i do have the skills, but i am also limited in time.
also if i count the hours i spend building it, its not going to justify the price.
if i had all the time in the world, i would build it for you, but unfortunately i have a heavy work schedule, and on top of that a family

The one on marktplaats looks like a nice cabinet for its price.
but you say you want to mount a CRT in it, so you first need to determine the size of that, and base you scale on that.
Do you want to install a pc monitor in there, or a real Arcade monitor, or a TV ?
many of the smaller Arcade monitors are 13 or 14".
The standard monitor in an arcade cabinet bitd was 19 - 20" , so thats not 1:2 scale.
I based all my mini builds untill now on the monitor size i used in those projects.
for example, the minipong has a 7" monitor, and the Original has a 14 - 15 inch AFAIK, so thats 1:2 scale.
Same for the current build i did, but i cannot tell about that, as its still a secret

i can say that its also 1:2 scale based on the monitor i used.