This is the list of some of the hardware we use. We thought we would share with you, so that you can build some of the stuff we have for your own projects.
Barrel plug cables for OrangePI boards. With naked wires suitable for the PSUs we list below.

OrangePi4 from Shenzen Xunlong Ltd. Their best board to date.

Power Supply. 5V/360W (70A). You can buy from AliExpress

OrangePI One Plus on Aliexpress. Shop served by the Shenzen Xunlong Ltd., the company behind OrangePI.

Flat Ethernet Cables from Aliexpress. We love them for saving space.

Orico 5x port USB charging hub from Aliexpress. These power most of our set-ups.

Heat sinks from Aliexpress. We buy these in bulk, best we found for our boards.

Box full of spacers from Aliexpress. There is never enough of these!

MicroUSB Cables, 0.5m length from AliExpress.

SAMSUNG SSD 860 EVO from AliExpress. One of these you need to run a reliable node.

SAMSUNG Micro SD Memory Card 32G 64G 128G 256 MicroSD from AliExpress

Rock64 Pine SBC, RK3328 A-53 based ARM board up to 4GB RAM
