In terms of budget this is what my 'M:I' book has to say about Mission and Star Trek
Barbara's transporation was one of the early skirmishes between the Mission unit and Herb Solow's replacement, Douglas S. Cramer. After starting his career as a television supervisor for Proctor and Gamble's daytime serials, Cramer moved to the Ogilvy and Mather ad agency. In 1965 he was hired as ABC's vice president of program development, where he oversaw the debut of Peyton Place and Batman. While in the number two position at Twentieth Century Fox, Cramer was asked by Paramount president John Reynolds to join Paramount Television. The requirements for the position were made very clear. "My job," says Cramer, "was to control costs on the three shows then on the air, and also to get new shows on the air."
"The people doing Star Trek, Gene Roddenberry and his people, were open to conversations about budgets and weren't impractical; Mannix was not as complicated, and the producers, Ivan Goff and Ben Roberts, knew how to do the show and could handle the scripts and the budgets." Cramer soon learned which of the Desilu holdovers would be his primary concern.
"Bruce had a wonderful concept of the show," Cramer feels, "put it together beautifully, but paid no attention to budget. Secondly, he traditionally wrote bigger shows than we could afford to do. They had a wonderful look, but once he decided on a location, there was no stopping him. Bruce was a madman about scripts and there would be layer after layer of writers working on them. He also left vast portions of the picture undone, even though he would go over the regular schedule. In those days Universal did hours in six days. He was doing them in eight, nine, ten, eleven days and then he would do another two days of inserts on a separate stage, and would never think of using an insert from another show. He would never use an insert again!"
Paramount's concern over extravagant television budgets seems odd in view of what was happening in the studio's feature division. No one explains the situation better than Peter Graves: "Charley Bluhdorn bought the studio and thought he could produce pictures. He was a big executive who knew how to run businesses, but didn't know anything about the picture business, and he produced some of the great all-time hits, like Darling Lili, Paint Your Wagon, Catch-22, On A Clear Day You Can See Forever. . ." These features were enormously expensive productions; when released in 1969-70, their box-office results ranged from disappointing to disastrous. "He had two hundred fifty million dollars worth of negative tied up that nobody wanted," Graves exclaims. "Nobody in the world! That's why they were cutting costs on Mission: Impossible and Star Trek, because Bluhdorn spent all the money elsewhere. So Charley said, 'Yeah, we gotta cut costs here.'"