^They probably wouldn't have been able to rent entire sets, just components and props that survived once the sets were torn down.
Although there have been cases where sets from one cancelled show have been inherited by another. The sets from the short-lived Timecop
series were reused by Sliders
, IIRC, and the sets for the failed John Woo Lost in Space
reboot became the Pegasus
sets on the Battlestar Galactica