I've looked several times over the years at buying in the US. A few years ago it did seem to save several thousand dollars, even taking into account the exchange rate and 13% tax here.
Right now I think you would loose with the banks charging 30% plus. You have to convert the US price to CAD and add the 13% tax to that. So a $100K USD MH would come to $146,900 CAD or more depending on the exchange rate that day (I used 30%). Then there are additional fees/inspections etc.
The only reason to shop in the US now is the vast choice of MHs. Last year I spent several months trying to find a rig like what I have now. Even though the dealer played games on price and was a total jerk all the way through I bought it because there was nothing else on the market with the same features.
In fact the dealer I bought from regularly flips MHs to the US because his profit margin is greater. The had two going over the day I bought mine.
So if I won the lottery I would do it, but for now the $$ don't work out.
Retired Canadian Army WO (1972-2000)
2008 Holiday Rambler Scepter 42 PDQ
Toad 2018 Ford Edge w/ Patriot Braking system/Blue Ox base plate/Ready Brake tow bar.