Clients can suggest an hourly rate when posting a job contract. The minimum rate for fixed-rate jobs is $25 USD, and hourly job contracts have a minimum of $8 per hour. You can choose your desired rate when applying for a job contract on Cad Crowd.
For contests, the client chooses a budget when the project is posted ($100 USD minimum for the 1st prize). The client can increase the prize value or add bonus prizes for runner-up entries.