If you are looking for a reliable and cost-effective WiFi router for Airdrop nodes only, I recommend considering the TP-Link Archer C50. This router offers good performance and coverage for its price point. It supports both 2.4GHz and 5GHz bands, which can be beneficial for Airdrop nodes as it allows for better network optimization. Additionally, the TP-Link Tether app makes it easy to set up and manage your WiFi network.
Another option to consider is the Xiaomi Mi Router 4A Gigabit Edition. This router is known for its stable performance and affordable price. It offers fast WiFi speeds and multiple antennas for better coverage.
Both of these routers should be suitable for your Airdrop nodes needs while also providing good value for your money. Make sure to check the specific requirements of your Airdrop nodes to ensure compatibility with the router you choose.