4x Vega 64 rig

Anyone have a working vega 64 rig and have any suggestions ?

Interested to hear how reliable the 64s are for GPU mining. anyone have one running 2 months+? Are they cost effective?

Also anyone know of a mining calculator to advise which coins are most profitable for mining? New to mining... starting slow before I whack some solar panels on my roof and go ham.

I'm thinking of something like the below as a setup which ive just pulled directly from a youtbe vid, appreciate any comments around a UK friendlier setup.. also risers? wtf are they? which ones are the best and easiest to get delivered to UK? Appreciate any help or if someone can point me in the direction of a recent thread on this topic. Cheers

ASUS PRIME Z270-P LGA1151 DDR4 HDMI DVI M.2 USB 3.0 Z270 ATX Motherboard PRIME Z270-P
Intel BX80677G3930 7th Gen Celeron
Rosewill Quark Series 1200 Watt Full Modular 80 Plus Platinum Certified ATX12V/EPS12V 1200 Power Supply Quark 1200
G.SKILL 8GB Ripjaws V Series DDR4 PC4-19200 2400MHz for Intel Z170 Platform Desktop Memory Model F4-2400C15S-8GVR
Phanteks Power Combo Device for 2 PSU combine to 1 M/B with Power Redundant Function, Black Housing, PH-PWCOB_2P1M, Retail (if I go to more than 6 cards in future)
CFIKTE NGFF to PCI-E riser card M.2 port to PCIE expansion card X4 slot adapter card