Freelancers often come across both retainer arrangements and one-time projects, and the two can feel very different in practice. A retainer usually means a client pays you regularly to stay available for their work over time, while a one-time project ends once the deliverable is complete. Retainers can bring more predictability, but they also come with expectations about response time and availability. One-time projects give you freedom but no guaranteed follow-up income. Which of these two arrangements do you think works better in the long run?