Yeah, “animated” is too broad a way to describe what you want, even in 2-d. Are we talking stop motion cut-up paper, inked cel type animation, or flash-like vector graphic animation, and at what levels of detail and realism: Hanna Barbera did Flintstones- level detail and realism vs. Jonny Quest level detail and realism. One takes longer to draw than the other. How articulated must the characters be? A static drawing with just an animated head and mouth and eyes? Does it have to move across the screen and do things? Are there moving backdrops, props or effects like laser beams? Is there lipsynch to voices, is there music and sound effects synched to anything? $1500 a minute might be lowball or overcharging, depending on your answers but we have no way to know from what you’ve given us here. The more detailed you define the need, the more accurate the time and cost estimate can be.
(Some Quest trivia for you: the dog, “Bandit” was drawn by a Flintstones artist because the artist that art directed the Jonny Quest show hated the dog, which had been forced onto the show by marketing types, and that’s why it never quite fits the art style of the rest of the show. Both shows were Hanna-Barbera productions, different budgets and timelines.)