Buying a US boat for Canadians - Cruising Dream (TEST)

So, since I have been shopping mostly in the US for a boat (since I really cannot find one for our needs in Canada). I have also been researching what it means for a Canadian to bring a boat back to Canada.

Even a Kayak would go through these importation rules

A lot has already been written on this topic, and I encourage everyone to read through it here,

Many US buyers, use a Delaware corporation to own the boat, and get around some of the taxing issues, but this is not feasible/applicable for Canadians.

For my specific situation:

Buying a US documented boat
Bringing to to Canada
To liveaboard; meaning it will be in Canada for very extended periods

The following rules seem to apply

Generally, there are no taxes in the state where it is bought, as long as it is removed in short order (depending on the state - 30-90 days)
When bringing it to Canada, which it is known as "importing" the boat, you will right away be subject to HST (PST+GST) as it applies in your province, that is 13% in Ontario. Too bad Alberta is so far and not on the great lakes, only GST(5%) would apply there.
If the boat is not built in North America, which I believe most trawlers fall in that scenario (as being from Taiwan), you are also subject to 9.5% import duty.

Even with 22.5%, prices tend to still be cheaper in US than in Canada, but you need to account for this.

I would hope that boats over, say 30 years old, should be exempt from duty, but I dont believe this is the case. Still researching, will update this post if I find better details on this.