Thanks gentlemen for the recommendations, but if I bought all that to make it work, I might as well buy an RPi.
The thing is, the OPi0 has exactly the hardware I need for my application: 1 USB port, 512MB+ RAM, onboard wifi, an additional NIC (wireless would be great, but wired will work too), microSD memory, capable of running linux (LAMP server).
If it were a one-off project, I'd be all for buying the nicer SBC (I've built my project on 3 different RPi versions and have at least 10 RPi's) or buying the accessories to make it work (that's something else I've done before), but I'm looking to mass produce my device for commercial sales and where I don't have the capital to develop my own board, I'm using off the shelf hardware. I like this board because it gets rid of the extras that cause my customers confusion (HDMI, SPDIF, 4xUSB) and it brings down my costs.
Do you guys have any recommendations for a different SBC that meets my minimum requirements, but costs less than the RPi3? Or a good resource that lists lots of SBCs and let's me search/filter for my needs?
As it is, the OPi0 works adequately, but the wifi isn't very fast or reliable, so I'm looking to solve that problem or find another solution.