I am engaged to a Canadian and live in a border city in the states. When we get married do I apply for visitors visa and then I can move over while I'm applying for PR? I will always work in the states due to my career. Thanks
Are you a US citizen? If so there is no "visa" to apply for, since US citizens are visa-exempt. You can simply show up at the border, and CBSA will assess your entry into Canada and give you visitor status on the spot if allowed entry.
You can't "live" or "move" to Canada while your PR app is processing. You can only "visit". This means if you attempt to stay in Canada yet commute to work every single day, eventually at a random entry CBSA may decide you're trying to live in Canada and will deny you entry. Or if you attempt to enter with a car load full of your belongings, you could also be denied entry based on that. So while your PR app is processing, you need to keep a residency in the US established in case you are no longer allowed into Canada.
Getting a NEXUS pass may help you to make entries into Canada easier, but you may still run into problems.