Does this look right or did I miss something?
you didnt miss a thing - except rental return reducing your expenses - which you mentioned. that $17k you mentioned on a $500k investment is a pretty poor return IMO, but then, horses for courses. what about depreciation? any tax reduction vehicles in play? rent rises through the 12 months?
using OPM to make money, is money you would have never had in the first place had you not used OPM.
chicken / egg. your argument is one commonly used by D&Gers and those with a failing mindset to justify their lack of action in a bull market. now i'm not saying you're from the dark side, just making observation.
if someone just said "i've been brought up around a real bad stigma with money and i'm quite afraid of investing - i understand it, but am afraid" i'd still have respect for them, because they're honest. some people are afraid of making money. it's just how it is - but justifying it with stats like those is just insane.