First off, it's my second round of complexes, and it does get easier. Sometimes I do 4, sometimes I do 5 exercise. Depends on equipment and/or space. I spend between an hour to hour and a half, that includes walking in, setting up and stretching. I now rest about 30 seconds between each exercise. But I had to work up to that 30 seconds...
For the crowded gym complex, keep it to 3 exercise, maybe four.
As per your example: 1 Overload OR 1 Strength
1 Strength/Speed OR 1 Speed/Strength
1 Explosive OR Work Capacity
That way, you use one station, one or two bars and 1 body
So for you, you could do: Pin Press, Medicine Ball Chest Throw and Plyo Push ups
Bench Press, Speed Press and Clap Push up.
Incline Press, Speed Floor Press and Bench Plyo Push ups
Well, you get the idea.