Last time I painted my room, it took weeks and it exhausted me (I'm kinda weak)
How do you paint a room fast and effective without being overly tiring? Any tools or tips? I'd like to be able to finish it in a day or two

If there isn't a way to speed it up, how much would a professional painter cost?

Additional detail: my walls are textured, not smooth, which is probably why it takes me so long