The process of estimating the number of hours can be done from the project description, but it's done by the talent you've chosen for your free trial. You can add the tasks you want the talent to do in the Slack channel we provide you and the talent can start off by labeling each with the number of hours they believe it will take them. Then, the hours can be added up to a total before proceeding to develop. You can also evaluate during the free trial that the talent is proceeding at the rate reflected by the estimate they gave. You can hence use that velocity during the free trial to get a high fidelity estimate for how long the overall project might take compared to the estimates they gave.