I need to build several (dozens, if not more) devices that need ethernet, an LCD display, and at least one free analogue input for a sensor array I'm building. I've built a few breadboard Arduinos, but nothing with ethernet. Whether it's breadboard setups, or something like a Pro Mini or off/non branded Arduino connected to something that gets me reliable ethernet and has an LCD display, preferably the standard 16x2, what is the cheapest way to build these?
I should note that I'm aware of Eagle software for designing PCBs, but haven't used it or learned it yet. Assume that I'd be building on a solderable breadboard until I can get that figured out if that's the cheapest option.
I have two prototypes at the moment. Both use the official Ethernet shield (not cheap). One is an Uno and the other is a Pro (5V, 16MHz, ATMega 328). I know there are cheaper ways to do it.