One thing with a sci-fi show, if it were say, one week on a starship, next on a station, next on a freighter, etc, 3 times the sets, costumes, etc. so 3X the initial $. Something contemporary like a cop show you can just use whatever cop stuff the studio has or rent it, use an already existing set with miminal fuss. How much to build DS9's Runabout or a full-scale Viper? I was just reading some stuff about "Columbo". When they decided they needed a car for him, they just walked to the lot where they had a bunch of old cars and Peter Falk just pointed at the old Peugot and said, "that's it".