Router and additional setup suggestions!

I'm using an ideapad 330s, 8 gb 512 gb ssd, 4GB AMD graphics card, I have an external drive (256 gb) attached to it for backup. I run my navidrome server on it along with PI hole and Nextcloud.

Now my PI hole isn't working at the moment because I'm using airtel router and cannot change DNS I'm looking at Archer AC 1200 v3 for my router upgrade (if anyone has a spare lying around I'd be happy to pay for it)

What else should I consider upgrading, so that the homelab stays up as long as I have internet, because sometimes the wifi card on the laptop needs restarting manually.

Looking for suggestions.