I think the design needs a rethink. the CP looks too high and deep with lots of room wasted.
I did the same design a few years ago and was frustrated with the confined area. I can see that LCD being a problem game wise.
Also there are alternatives with the
PSU for ITX mainboards.
You could have easily placed the mainboard on the back on the LCD and still provide adequate airflow.
What additional fans are you going to implement too cool that environment?
Is this a gift for someone or are you going to use it?