If you succeed, how do you plan to handle ZigBee or Zwave connections? I’m a bit unhappy with my ZigBee dongle remaining a single point of failure.

Just click on the settings icon on any SearXNG instance. You will see a list of search engines with checkboxes to enable them and the bang notation you can add to your query to limit a search to just this engine.

My suggestion would be: try to get used to it, it’s really worth it.