Just a suggestion. Make due with what you have at your disposal:
(1) Apartment gym
(2) Vehicle and wide open parking lot/field.
(3) Backpack full of books.
Unilateral machine work for all body part at your apartment gym complex, especially if you are able to max out the machine weight bilaterally. Split muscle groups as you did in college.
For legs, consider car pushing (take all safety precautions). Find a wide open parking lot or field. Might also consider deadlifting one end of a vehicle if you are able to do so, and safely. Toss in pistol squats (video below), plus backpack for added resistance. Natural glute ham raise (GHR) for hamstring work (video below), plus backpack for added resistance. Hook your feet anywhere that allows you to perform a GHR.
Plus, find any type of overhang or pull up bar, stuff your backpack full of college books for added resistance, and do pull-ups.
Glute Ham Raise