@vogelrnws, We are using 4G LTE modems that are recommended by EnviroDIY with the LTE Bee Adapter. Verizon will send us SIM cards once we give them a list of IMEI numbers for the modems. Fortunately, our agency has access (with approval) for certain AWS storage/computing services, so I can take advantage of this since this project is relatively small, data-wise. I will only have 7 sensors sending data at 15 minute increments.
The main hurdles I need to address are items 2 and 3 in the original post on this thread. Basically, setting up a publisher script to push to an amazon endpoint, and configuring that endpoint to process the JSON data streams that get sent every 15 minutes.