Bond two Internet connections of varying quality

I live in a remote part of the country, Internet-wise. I utilize a satellite based Internet, but it's having many problems during peak traffic times. I have researched a bit and found Ubuntu Bonding. If I build a Linux PC and connect my satellite Internet to the NIC, and a Netgear Aircard for 3G/4G, would Ubuntu Bonding allow me to use these two connections in various states of quality? Should I be added a squid cache too? Or is that a solution for a different problem? I want to use a RaspberryPi, but it lacks Gigabit Ethernet and might slow down the overall experience. Will likely use an old PC.