Agree that a park model might be best if you don't intend to move it from place to place.
Years ago my in-laws got tired of driving their MH back & forth from north of Toronto to Florida. They found a nice, reasonable, used 30ft travel trailer (not park model) then found a campground with storage. They never plated the trailer since it never moved off the campground property.
As far as I know there were never any tax implications with either country, both when they bought it and, over a decade later, when they sold it.