If you are moving to Ecowitt, you don't actually have to buy a console with a screen at all.
Choose one of the 3 available GWxxxx console/gateways, feed your data to Ecowitt.net and use an under-used tablet that you already own to display your data. Or use a PC monitor, or a phone etc.
If you are uploading data to data logger, say CumuluxMX, you can skip uploading data to Ecowitt and just access the CumulusMX data directly (via tablet, monitor or phone).
If you choose the GW3000 gateway, it has an SD card capability. Data writes to the card, and CumulusMX can 'backfill' data from the card. This is useful if you experience a power failure and the CumulusMX system loses power. However, you would still need to use a UPS of some sort to keep the GW3000 running.
Note that even without a datalogger set up, the GWxxxx gateways have a local IP address on your network, and have built-in webservers. So you could just go to that IP address with whatever device you choose (tablet, phone, PC etc) to view your data.