The only time I rejected it completely is when I had an investor who was subleasing the property from me and wanted to turn it into a group home for ex felons, because the neighborhood was pretty decent a group home with a dozen plus felons in one house would kill property values in the area.

However, do we need to consider the currency exchange or are there any other fees we will have to pay from transferring this from Canadian account to American Account?

China owns more US currency than the US.

I would agree as I stated before that if you have a fixed-rate mortgage, that debt will deteriorate due to the devaluation of the currency.

What might matter is the political situation, the currency's value and similar. 

If you end up transferring funds across borders/currencies I can recommend you to a transfer service that can typically save clients 3-10% in the transfer process, sometimes more depending on the currencies involved.  

A Mexican facility feels so concerned that they won't take OUR currency.

"I do not want the same kind of focus on safety and soundness [in the regulation of Fannie Mae and Freddie Mac] that we have in the Office of the Comptroller of the Currency and the Office of Thrift Supervision.

Yes, always count your profit in percentage rather then currency. 

Since, only 38% of government expenses are funded by income taxes and since, US citizens bear only 37% of the loss in value from newly printed dollars used to cover US revenue shortfall, only 14% of revenue shortfall is borne by US income taxpayers. (38% of US expenditures paid from income taxes x 37% of loss in the value of the dollar borne by US taxpayers = 14% of US revenue shortfall from failure to pay income tax is borne by US citizens.)The great advantage of the dollar being the world's reserve currency, is that it is mostly foreigners, not us, who bear the cost of constantly devaluing the US dollar. https://comparegoldandsilverprices.com/news/economics-101/dollar-devaluation-since-1913/Moreover, many authors have noted that the US does not need the income tax to fund the government at all. https://www.forbes.com/sites/briandomitrovic/2013/04/02/to-fund-the-federal-government-we-dont-need-federal-taxation/#573211bd51f3Indeed, for well over a hundred years the U.S. government ran just fine without an income tax.