It's not worth my time to deal with the hassle of conventional loan anymore, so I don't even consider it as an option.

@Ryan Dori lots of options besides DSCR. 1 Year income, Asset Depletion, Bank Statements, and P & L only loans. 

Now, getting around the Due on Sale might be as easy as doing a Contract for Deed or a Purchase Option instead of Sub-to.

One of the key challenges I’m facing is understanding the financing options available to someone without Canadian residency or a local credit history.From my research, it seems that a 35% down payment is often required, with interest rates around 7.5-8.5% for non-residents.

Quote from @Sarah Kensinger: Reach out to @Jeff Chisum and see what options you may have for this property. 

This is because VA loans are tied to the borrower’s personal ability to repay and require a creditworthiness review.VA Entitlement Consideration: If you’re assuming a VA loan, the original borrower’s VA entitlement may remain tied to the loan unless you’re a veteran eligible to substitute your own entitlement.2.

So you all have to weigh your options .   

I'd like to move forward with option "b".

You aren’t owners with lease options.

There are many options for skip tracing, most just send a query to a single database while others hand-scrub the lists for the results.