need help dissecting a deal.

[Ernest Quallis]

I am looking into purchasing a multi family ( quad)  

asking 170k might offer ( 140k)

down payment 3.5% 6k  or  (4900)

insurance monthly is roughly 90.00

property tax based on 222,0000 152.00 p/m

p&i 660-700 pm

each unit rented for 600 average.

property needs about 15k in minor repairs.

in your experienced how does this deal look?

p.s. if i need to give more info let me know