For me and my social circle it's a once yearly event, very occasionally twice yearly. I have a full tower case (HAF 932) and it fits in my car no problem along with a monitor, peripherals and cables
So whats wrong here? We've given you tips and cases, now what?
You can only play lolconsoleports (me3, skyrim) on 3 screens with a single card tho. Forget about running Battlefield or whatever without 2 xfire cards.