NFS was working fine and I had managed to mount my entire /home/old_name folder upon login/boot, however, after a username change (sudo usermod new_name old_name) and updating /etc/fstab, NFS no longer mounts /home/new_name. What has gone wrong and how can I fix this?
Turns out what was happening was that I changed the username without changing the user/group IDs, which I thought would not interfere with NFS (which is true, and it didn't), however, I didn't realize that I also had to manually change the home folder. Therefore, the computer was automounting to /home/new_user, but I was being logged into a blank /home/old_user directory. Simply run the below command to change your home folder, and everything should work fine:
usermod -d /home/new_user new_user
Replacing new_user with your new username...in case that is not clear