Honestly, that’s dirt cheap for a PLC. I’d say that you should have a look on Craigslist or eBay, but you probably won’t find anything much cheaper. Also, a lot

Honestly, that’s dirt cheap for a PLC. I’d say that you should have a look on Craigslist or eBay, but you probably won’t find anything much cheaper. Also, a lot of PLCs are “cheaper” because they have relatively expensive software packages required for programming them. You’d probably do much better with a RPi and a RTD module (1-wire, i2c, etc). You wouldn’t get the ladder logic, but you could use node-red. Heck, there might even be a ladder logic based program for the RPi. I wouldn’t be surprised.