My standard hourly rate for writing and editing is $60 plus HST. I charge $45/hr for not-for-profit organizations. I can give you a fairly firm idea of how long a job will take if you provide me with some details of what you need. I include buffers of 2 hrs for jobs under $1000 and 5 hrs for jobs over $1000. This means I ask you to budget in a certain amount extra above my initial quote, in the event that the job requires more work than anticipated.
Jobs under $1000 include up to 1 hr of revisions. Jobs over $1000 include up to 2 hrs of revisions.