It definitely doesn't cashflow at the 3.5% down, and I don't think it will at 25% down.
I think you're low on the expenses. You don't have reserves for big things going bad. A better way to estimate the expenses is just to say it's going to take 50% of all rents to make expenses (including vacancy). It may be that this 4-plex takes a little less than that, but don't assume it will.
Using that number that means you're going to bleed (2,900/2) - 2,267 or -$817 / month at 3.5% down. At 25% down you're going to have a cashflow of (2,900/2) - 1,950 or -$500.
Even shoveling $500 into an investment every month will be bad on your balance sheet. This looks overpriced, and even if you're managing it yourself it's still tough.
It's tough being an undercapitalized landlord. You tend to put off maintenance which makes it more expensive in the long run. A single non paying tenant can be devastating. Think long and hard before yo do this.