I use Turris Omnia, which is stock OpenWRT + their (open source) addons. You can configure VLANs like you mentioned, I do the same. It is on the expensive side

I use Turris Omnia, which is stock OpenWRT + their (open source) addons. You can configure VLANs like you mentioned, I do the same. It is on the expensive side, but the hardware is beefy and you get vendor's support for OpenWRT out of the box.