Question Case Swap HP Z4 G4 Workstation

Sep 23, 2021
Budget (including currency): $200ish (but I am frugal)
Country: USA
Games, programs, or workloads that it will be used for: Adobe Photoshop, Video editing, Streaming Audio and Movies, Games - Call of Cthulhu, Forza Horizon 4/5, No Mans Sky. Dungeon & Dragons Online, Minecraft, HALO, and more
Other details Its pretty Stock: 1080 GPU, 8 8GB DDR4, 3 HDD - 2 500gb and 1 1tb (No SSD or NVME yet), slimline DVDRW, and front panel media hub w/power switch

I have a HP Z4 G4 Workstation that I am looking for economical suggestions to replace the OEM case due to its very poor cooling and the steal case being as heavy as a boat anchor. Has anyone rehomed one of these and can give me advice on things like PSU fit? Cable extensions? Motherboard mounting problems. Or if the components of this PC are just too specialized to fit in a OTS case.
One more thing, the two M.2 slots on this motherboard are on the lower righthand corner of the motherboard. Causing the NVME to stick out. Are M.2 slot extension cables a viable option?