SUV work permit timelines are a roll of dice. I personally know three people whose SUV WP took nearly five months. Nowhere near the promised two weeks. It is better to apply for SUV directly.
If a Start-up business is up and running - or has potential customers - then the entrepreneur(s) can begin billing and collecting receivables from his/her home country if not already doing so. Incorporation, or the lack thereof, has no effect on that process.
Incorporation in Canada takes only a day and then setting up a business bank account is done in less than an hour. Within 30-45 days, all account receivables can be successfully redirected to the Canadian entity.