Another UDKer checking in. Also, regarding dev machines, I think I need to sing the praises of Amazon Web Services here. If your current dev machine isn’t fast enough to run UE4, then you should rent an AWS GPU instance. A spot instance will cost you about 13 cents/hour for 8 Xeon CPUs and a huge Nvidia GRID GPU. I use a much bigger machine to crank out my lighting builds, and what takes my home machine all night to finish, I can do in just a few minutes on AWS.
Edit: Oh, and I too am a dev team of one, doggedly trying to finish a project I started nearly two years ago.