If this is a qualified retirement account (tsp’s are) then you can transfer/roll this into an SDIRA or solo 401k and as long as the custodian allows for alternative asset investing you can invest in real estate or just about whatever you want.  

If your upgrading to a new property (larger home), job transfer or a extenuating circumstance of a life change, lenders will underwrite the loan as a primary in a make sense scenario. 

That is not reflected in the lawsuits related to this issue.You make no mention of the escrow costs or tax implications or transfer taxes or scrutiny that is involved with a deed back.

Check in with @Joseph Chiofalo he works with many international investors.

They forged documents, have the assessor for king county as one of their CEOs (my property was in Clark county WA but my property title was changed in King county WA where he WAS the assessor) hsbc had to pay me and countless others for bad foreclosure practices and that caused them to go bankrupt and my loan was floating and I essentially owned home free and clear due to terms of the contract stating that if loan was to be sold that hsbc my husband and I and the new proposed lender had to all meet in person and sign new paperwork permitting the transfer of the loan which never happened.

I'm a realtor with new international developer connects in both.

Transfer or Rollover Funds: Move your funds from your existing retirement account into your new self-directed account3.

HI David, fellow Canadian originally from Oakville here...my mortgage team specializes in foreign national or international buyer mortgages with no US credit.

The idea that I’d need to know the internals of the home makes a lot of sense.

This "not that big country" actually has 7 International airports.