After posting my question and researching a bit more, I actually came across the Ubiquiti Access Point Outdoor+, and others. So I contacted local distributors and I think I'll get one from them, mainly since the internet service at this client location is being received by one of their products that I set up, a directional long range antenna (PowerBeam).
I thank you for the quick reply and confirming that I'm on the right track.
Ohh and for the mobile devices I'd put a plug and play range extender on far out areas that might need It.