1) Property Taxes Between 0.18% to 1.89% in the US. Let's assume the mean of the two for 1.035%. In the first year, that would be a payment of $5,175. Over 30 years, using the same 3% inflation to calculate the future value of an annuity, that works out to $246,202.78
2) Opportunity cost of down payment. Assuming a 20% down payment of $100,000, the future value of that money would work out to $100,000 x 1.03^30 = $242,726.25, or a gain of $142,726.25
Note that this is already quite a conservative return. A well-balanced portfolio over the last 10 years, even taking into account the disaster of 2008, would have easily exceeded 6%.
3) Maintenance/Upkeep At $2,000/yr and 3% inflation, the future value of the annuity would work out to $95,150.83
So, the cost of owning in your example is actually: $783,370 + $246,202.78 + $95,150.83 = $1,124,723.61
and the cost of renting is: $1,141,809.977 - $142,726.25 = $999,083.727