Hi,
I have experience for 15+ years in electronics/embedded development. I have several years of advanced AVR/arduino development, including library development from scratch. Practically all Arduino AVR boards used, like: 2009, 2010, UNO, MEGA, NANO, MICRO, MINI, etc. Several shields used like Ethernet (W5100, ENC28J60, etc.) with various IP protocols implementation, various graphical TFTs with and without touchscreen and various BUS types (parallel, SPI, I2C, etc.), all kinds of sensors and buses, serial and parallel memories, etc.
I have previously worked with GSM/GPRS modules for arduino, and although I don't have the sparkfun LTE module, I think I can successfully help you get it working. I will have no problem in combining the example sketches into only one unified.
Regarding the hardware serial support, if you are using an arduino Uno (or other with only 1 hardware serial port), you will loose the serial debug port functionality and will not be able to know in the PC terminal what is happening in the sketch. I suggest using an arduino with at least 2 hardware serial ports (like the mega2560 with 4 hardware serial ports).
If you are interested in my bid, please let me know some more details about your project and I'll be able to answer you back telling if I'm up to the task or not. Feel free to contact me.
Regards,
Carlos.