They are definitely lower budget than 'normal' movies. But even as a low budget it still requires all the same production staff, camera, sound, editor, crew park staff, food services, wranglers, casting etc. The cheap part is unknown actors and not a lot of travel. Source: my wife has done background work on many movies and TV shows. As background they get paid to sit until call time. so scene maybe half hour, but all the background people waiting get a full hourly pay and all the food you want while waiting. You will notice on hallmark they zoom in tight so background is barely visible, this helps not having a large set of background people. in one movie at the mall they had my wife shopping and walking back and forth. it works for the scene but if you watched it closely you would notice the same lady in every scene carrying different boxes or bags.

It is kinda weird they haven't made the Teletubbies decision to stop making new episodes once they have enough to loop. Once they have, what, three hundred? Then they can fill twelve hours per day from Halloween until Christmas. Shift those by a few movies every year and people will catch a whole different set based on when they watch TV.