It's been over a month since I started constructing the development environment, and I can finally say it has been completed. Any change to code I make, I can immediately deploy to a test environment, the deployment taking only up to 5 minutes maximum. The test environment is public, so I can ask anyone to come join and bug test updates before they are reflected in the official game! I am more than delighted to program for PT now that it doesn't take around 30 minutes or more to test added code.
Thank you to Blank101 for quickly fixing a bug in Sandboxd that prevented my test environment from functioning properly. :)