One thing to keep in mind is that different states can have vastly different regulations around lending and borrowing, so lenders may operate only in specific states vs. nationwide. 

If the lender is a bank, credit union, or some financial institution, they are probably not going to sell a one off note.

@Erica Hutchinson, lending on anything over 5 units is considered a commercial loan so it is really up to the lender.

A Canadian working overseas could qualify for a (purchase) mortgage under the Non-resident (NR) mortgage program - the lending guidelines vary from lender to lender. 

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I would have these other people lend money on the project and give them a lien on the property.

@Max Mavec@Bhekizwe M.There are banks and lenders that will lend to foreign investors but usually the rate is slightly higher and the down payment required is higher.

There are lenders out there that will lend on small multifamily properties, that wont take into account your personal income as long as you have good credit and the cash to close.

Lastly, you might consider only instituting one rent increase at a time.

Holdover cash position and go into lending or flipping, those are your two best options.