custom I need help with a personal Playstation build

[Will Grice]

Ok, so I'm not a newbie by any means to software, hardware, builds, and modding; but im very far from a pro. I recently had an idea that works in my head, but I cant figure out how I can do it well. I have a fat ps2 (scph 39001 no expansion) and a ps3 slim (160gb) I'm soon going to buy a ps4, but I dont know weather or not I should buy the original fat ps4 model, or the slim; depending on which will suit this build better. (I have no personal need for the pro)

 

So here's the plan; an all in one "playstation." ps2 and ps3 run the native ps1 titles by themselves, so I dont need the ps1. The plan is to take all of the components out of the ps2, ps3, and ps4, to to fit into a custom PC case. I'm thinking 3 disk drive slots (one for each system) and maybe finding a way to run all 3 on 1 power supply, along with optimal cooling (water cooled maybe?) I know in the end it will still need 3 different display outputs... the ps2 will stay stock, maybe add the expansion or mod to a sata hdd. The ps4 will remain stock, for psn and stuff like that. The ps3 I plan to soft/hard mod, but that is all in due time. I cant figure out where to begin with this mod.. I think finding a case suitable for the job may be my first step. What do you guys think? What are your thoughts? I want this to be a unique, but visually satisfying build, with alot of versatility. Any thoughts are much appreciated!