Who I have the same questioned this topic

So I want to monitor my calving barn remotely at home, work or otherwise with some cameras.  The barn is a mile away from my home, and has electricity but no current internet service.  So I bought some D-Link DCS-5020L outdoor cameras.  I don't plan to stream video, but instead just check in a few times per day to see if there are any problems or new calves...I don't think data will be a problem because the app turns off the cameras when I'm done with it.  My thoughts were that I would be able to use my tablet hotspot as the conduit for video viewing.  Apparently I was wrong and should have read up on it more.  I went through all of the setup instructions, but things came to a halt when it attempted register it on the mydlink site.  After several attempts, I looked here and found a lot of discussion on NAT, public vs private IP address, static IP, port forwarding, etc...  Most of which I don't know much about or fully comprehend but I've tried to learn.  By the sounds, it's nearly impossible...but I'm sure people are doing it.

So if I can't do it with my tablet hotspot...how about using a Novatel T1114 broadband router with voice.  I have a friend with this very same setup and these D-Link cameras hardwired with an Ethernet cable.  After I learned I couldn't do it with my tablet hotspot, I searched on this Novatel router with cameras...and have seen as many topics indicating that it couldn't be accomplished either without a lot of work.  How can that be if my friend's setup is working fine?  I am certain if his setup wasn't plug and play it wouldn't be working.  I'm just a little gunshy about buying more hardware and not getting it to work.  Has something changed with Verizon that my friend's setup still works and I couldn't get it operational now?

So what's the deal, what do I need to do?  Can't I get something plug and play to work with this router, a tablet hotspot or a jetpack?