I have completed this exact task in the last 12 months. I lead the finance team for a US entity and was required to set up a remote office in Toronto.
My bid is above you estimate as there are a lot of registrations that you need to do depending on the scope of work. State taxes, federal, bank accounts, interact payment portal (essential for doing business in Canada), payroll registrations depending on the size of the business.
Please email me if you are interested and we can discuss your requirements in more detail, which may reduce the price.
Thanks
Luke