@Eduardo Bravo - I think you are underestimating your Maintenance/CapX/Vacancy expenses-reserves.
If you are this close to buying, I would really drill down. What is a new roof going to cost you? Estimate that, then divide by about 20yrs. and that's how much you should be socking away just for that. Repeat with calculations for siding, flooring, carpet, tile, paint, windows, appliances. I believe that you'll quickly find that just CapX reserves alone are running you into the $4k-$6k range annually.
I would also assume bump up the vacancy reserve. Remember that if just one of the units sits vacant for 1 month out of the year, that's 2.01%. I would assume you'll be turning a unit at least once per year until you've had it for a couple of years and can stabilize things.
For maintenance, I usually budget 5% of gross rents if it has been recently renovated, 10% if I think there is deferred maintenance that'll need to be cleaned up quickly.