Upgrade fully or What

Okay so here is the Scoop. I’m a new multi-boxer, and I want to get into streaming. Here is my list of demands.
4k Monitor
Raid at max settings
Multibox on 5 accounts

Here are ny pc specs.
May 07th

UserBenchmarks: Game 57%, Desk 80%, Work 61%
CPU: Intel Core i7-4770K - 76.7%
GPU: AMD RX 580 - 57.3%
SSD: Samsung SM871 2.5 7mm 256GB - 114.3%
HDD: Hitachi HUA721010KLA330 1TB - 38.2%
RAM: G.SKILL RipjawsZ DDR3 1866 C9 4x4GB - 56.4%
MBD: Asus H87M-PLUS
I have a few basic 24 inch monitors. nothing special
Pc Case: Thermal Quake, Unknown Model
Mouse, Logitech g203 Prodigy
Keyboard: Crappy old Razer

With that being said I have a 3k budget. So should I get a new PC with all new parts or just upgrade the Current one? was thinking i could get the i5-9600k and get 32 gb ram and a Nice Mobo and the 3080.
Any help is greatly appreciated. BTW I want an all white build.

If you’re wanting to multibox on 5 accounts then I’d probably wait a week for the Ryzen 9 5900x announcement (it should be released later this month). The i5-9600k is a last-gen 6-core processor vs. a next-gen 12-core processor.

Awesome ty for the input