In reality, you can only have two of these at the same time.
If you want good and fast, there is no way it can be cheap. To get your job done, your freelancer must reschedule all other jobs, work long hours and spend at worst two or three days juggling with the backlog your job created. Priority always has a price.
If you want good and cheap, it cannot be fast. Jobs with fixed production deadlines and jobs that are more profitable will take priority. Your freelancer will be able to attend to this type of jobs only when there is nothing more urgent in the works.
If you want fast and cheap, it won’t be good. Even if your freelancer is willing to accept a job like this (his or her own reputation will be on line), there won’t be time to do any background research, plan the work in much detail or polish it to the usual standards. Quality will always suffer from being rushed.
This is why you should always plan for enough time and have a reasonable budget when ordering marketing copy, visual design, software development or any other creative job.