Yikes! $300 and it uses an algorithm to measure rain? 
$105 for all the same readings (except lightning strikes) with the Ambient Weather WS-1550-IP. You also can measure indoor temp and humidity, which WeatherFlow does not. Has same IFTTT, Google Assistant and Alexa integrations, and there's a HE community integration which is working great.
https://www.ambientweather.com/amws1500.html
Here's a UK version, but you'll have to bring these readings into Weewx first. Easily done though.
@Cobra has this station and has good things to report about it. Here's the Misol branded version available in Italy.