I did an upgrade over several years. I started with a Pro2, then added solar, added an Envoy with serial logger, then years later the UV sensor. Then years later added the Daytime FARS and an Aerocone, and then found a used console on eBay. I then bought a WiFi logger.and an Anemometer transmitter. I plan on buying the refresh kit from SI so I can go to the single tipper.
Yeah I spent more over the long run but I did it as I could afford it.