I am looking for a cost-effective and stable router setup that can accommodate over 20 devices without frequent disconnections. The router should have a wireless speed of at least 900Mbps. Additionally, I would like the option to flash OpenWRT for custom configuration, specifically to block non-upper-layer routing ports.
In terms of pricing, the more affordable the better. I'm looking for a reliable option that is easy to set up and does not require extensive technical knowledge.
Thank you in advance for your help and consideration.