New/Old wall mount PC [need suggestions]

[ManuOfficial]

So, i have this old system that I use for retro gaming. I was looking at some cool wall mount pc's and I got inspired to make one. Although, not as flashy. So, no RGB and such. I have only three main things to mount, the motherboard, HDD and the PSU. I had them laid out in a pattern that works for the PSU chord length and looking somewhat decent. 

I would really love it if you could help me fine tune the layout (although, not entirely possible the psu has a really short line for cables)

Shopping for parts, mainly,

1. Suitable back board to mount the hardware to

2. Mounting hardware (DIY if possible)

3. Vertical or horizontal

 

I can't stress enough, i'm not going for looks. I'm just trying out my first wall mount build, so that I learn some techniques for my real build later this year. This system will most probably hang in the basement gaming room where nobody other than me can see it.

Thanks in advance for your help

 

[startrek03]

If you need the measurements of ATX motherboards and PCIe cards, here'll be the according the according specifications:

• ATX specifications: https://cdn.instructables.com/ORIG/FS8/5ILB/GU59Z1AT/FS85ILBGU59Z1AT.pdf
• PCIe specifiactions: http://read.pudn.com/downloads166/ebook/758109/PCI_Express_CEM_1.1.pdf