Do I need to lower my standards or try to find alternative ways to source deals? 

I guess we will all find out eventually.  

Thank you for sharing the numbers, as I'm sure a lot of investors will have a lot of different ideas for you based on the outline you provide. 

Plan to live in the duplex for 1-2 years before finding another multi family. 

You may have some luck finding some creative solutions there https://www.biggerpockets.com/forums/50

I hope to never sell this cabin (nor likely any of my others), as they are providing a lifetime stream of income, a place to vacation, and will do the same for my kids and their kids one day.  

You'll find tons of good info here, I recommend checking out a local meetup or two as they're super helpful to brush shoulders with other folks that have either done what you're doing or are asking the same type of questions. 

@Tom Thomson let us know what you find out from your lawyer!

Martin,If you have a lender who is going to offer you a Foreign National DSCR purchase loan for $100K or under with a rate of 7.625%, you better find a way to close fast. 

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