I wouldn't f*** around with things like one-legged squats, or 3-way split routines. You've got limited time, some weeks you'll miss one of the workouts, another week you'll get 4 in, what then? You need bang for your buck. This means loading you up and doing just a few reps in a few sets. You need a pair of kettlebells, or better a barbell and plate set.
For example, clean & front squat & press (or push press or jerk), do 3 sets of 3 each day. That would cover you. Toss in some pullups in between each set. If using kettlebells, farmer's walk them around the gym at the beginning and end of each workout, or if you're really masochistic between each set of cl&fsq&ohp.