I just started with Arduino. I am an experienced software developer so the programming side was already mostly known to me, and I am surprised at just how easy Arduino have made the hardware side of things, and how easy to use the various libraries are. So for my first non tutorial project, I want to make air quality sensor web servers to be placed in several rooms throughout my house. I will then have a program running on my PC which collects readings from each sensor and stores then somewhere, to be analyzed later.
All I have right now is an Arduino UNO R3 starter kit, and I am having a WiFi shield delivered today. I feel confident that I can have a working version using the kit that I have shortly after the shield gets delivered.
But my question is: what is the best (some combination of easiest and cheapest) way to crank out half a dozen of these?
Presumably, most experienced makers don't include a breadboard in their finished products? I suppose I should buy a soldering iron.
Should I buy half a dozen UNO R3s and half a dozen WiFi shields (along with air quality sensors)? Or is there a cheaper option that is intended for semi-productionizing an Arduino project?
PS: I feel like the tags I have included barely intersect with the purpose of this question, so if you know of any more appropriate ones, feel free to suggest/edit.