One thing lightly skipped over in the document to prepare your vehicle for import is that it has to meet the Canadian motor vehicle standards. That may not be an issue if you intend to purchase a relatively new motorhome. However if you're looking at one built in the 1990's or earlier there could be issues.
A friend of ours (Canadian citizen) purchased a 1996 Winnebago Chieftain to import to Canada. She didn't realize the older models aren't necessarily compliant with current Canadian standards. Part of the vehicle inspection was to be sure the speedometer and odometer would read in kilometers. Her's didn't and it cost a bundle to be compliant. The speedometer was easy in that they just applied decals in the proper places to read KPH. The odometer was a bit more complicated in that not only did the speed sensor ratio need to be changed, but the odometer itself had to be removed and reset to show the accumulated kilometers.
The inspection and related changes to make the vehicle compliant cost a little over $1,800.00. Hopefully the newer vehicles won't need as many changes.
