I have considered that the lift pump could be a culprit, but I find this extremely unlikely. I can pump it by hand and hear the over pressure valve buzz and hiss when fuel starts returning back out to the filter and return line.

I ohmed the glow plugs as well. They seem to be working fine. Like before this, the glow plug light on the dash still turns off faster after I have built some heat in the cylinders trying to start the engine compared to a completely cold start.

Thanks for the help. I ordered a remote starter switch so that I can try starting the engine by myself and watching it to see if I discover anything new. I have mostly been working by myself this time, aside from a few times my wife came out.