Before the skyrocketing prices the plan was to sell a pair and 1031 into one dream property that might someday become a primary.

Single- and two-story homes, joined in pairs by a prefabricated common core (that contains the plumbing and electrical), cluster around a landscaped courtyard.

Pairing your capital with seasoned investors and earning while you learn can be advantageous, to say the least. 

The tenants in the home currency will be moving out at the end of this month; August 1 is the first day my property will be available for new tenants to rent and move in.

I am looking into buying a pair of duplexes in TN (I live in Texas) and would like some advice.

If you hold a rental property long enough it's hard to make no return/negative return just because of the nature of markets and fiat currency. 

Investing in currencies & the stock market is the same as playing slots in vegas. 

Just wanted to get other pairs of eyes on it to see if even makes sense

Paper currency got its start as little promissory notes to pay gold, and then because the notes were more portable than gold, people started using the notes as money instead of the gold itself, which is why you sometimes see references to "one dollar notes", etc.A seller may or may not accept a promissory note as payment. 

Does this not work for properties bought with foreign currency?