I didn’t know it was illegal to live in one state and have a license plate from another, at least under certain circumstances. I call BS on that part. You can buy a car from someone in another state, and have the license plate until it needs to be renewed.
Actually no. I most states you are required by law to transfer the pate within 30 days of your change of residence. This is usually not strongly enforced, except in states where Property Tax is levied on vehicles. There they tend to be a bit picky about it since it means cash for the government coffers.