https://www.amazon.com/dp/B07YZDS9LF

Better value than Micca RB42.

$400 is a terrible price for a Denon S570. You can get the same model for $250.

https://www.accessories4less.com/make-a-store/item/denavrs570bt/denon-avr-s570bt-5.2-ch-x-70-watts-8k-a/v-receiver-w/bluetooth/1.html

16 gauge copper clad aluminium works but 14 gauge oxygen free copper has about a quarter the resistance, making it better for long runs.

https://www.amazon.com/AmazonBasics-Speaker-Wire-14-Gauge-Oxygen-Free/dp/B0758CSSF2

Banana plugs don't improve connection quality, just make swapping cables faster. For a budget setup you should skip them.

Dayton Sub-1200 for $180 is a good budget sub. Although if you can save up, the SVS PB-1000 for $400 is substantially better.

https://www.parts-express.com/Dayton-Audio-SUB-1200-12-120-Watt-Powered-Subwoofer-300-629?quantity=1

https://www.svsound.com/products/pb-1000-outlet-1