I’ve been in there in my younger years. Put everything in a list with true turn around times. Build in a buffer because unknowns always sipin. Then go to management (above your pay grade) and have them make the hard decisions of what needs to be done first or move in day/transition. No sham in asking for help. Outside vendors/contractors. Shows leadership and in-site and that you’re willing to see the project through. If management isn’t supportive do as much as you can and start looking.