Television shows generally start with a loan.
Item one on the cost list is the interest on the loan.
Salaries for actors, cameramen, make up artists, second unit directors, assistant producers, caterers, . . . dolly grips, . . . etc. etc. etc. Have a look at the credits. Just about everyone on that list got paid. It was all costs.
Payment for all the music played, including background stuff.
Rent for the locations, studios, and probably some temporary living space for a few folk you can not get to come otherwise.
Transportation for all those people, too.
The suits who sell the advertising for the the show, accountants, lawyers, technical experts of various types. Their secretaries, their assistants, and their secretaries.
Properties. (that is every set peice, every prop, and every costume for the entire production.) You have to have someone to buy, make, inventory, store, and take care of every single item, and arrange for said items to appear on the set when they need to. You will need a place to keep them, too.
Do we have script? We might need one. If it is a long running show, we need some continuity checkers, too.
By the way, these people all live in either Los Angeles, or New York, so go figure the salary ranges you are going to have to offer, if you want anything above average in terms of ability.
A thousand a week here, a thousand a week there, pretty soon, you’re talking real money.