Dude, I have to request that you readjust your mindset. You bought a fully occupied duplex THAT CASHFLOWS(!), and you have the opportunity to increase rents already, AND you did it all without the biggest RE investor resource in the world (biggerpockets).
You should be turning cartwheels right now! As lots of the pros around here say, real estate isn't a get rich quick scheme. You're creating passive income. Even if your cash flow remains at 132/month (which I think it's been shown that that's a miscalculation), that is essentially free money. I have 25k in the stock market, and it's not returning dividends of 150 bucks a month. Nor is my asset potentially appreciation (not that you'd want to count on that, but Portland is a strong market).
Now that you know about bp and the 50% rule, and you're getting the real world experience of owning your first investment property, the next deal you do will be even better. In a few years, you might decide to cash out of this duplex and reallocate that capital elsewhere. In the meantime, I call it a solid double up the middle. Congrats!