Wait and go bigger? or buy duplex now?

[Luana Mazon]

Hello real estate sharks,

My fiance and I live in Lowell, Massachusetts and bought a duplex in April of last year. This house makes $1700 in rent. Its a flip house with all granite counter tops, stainless steel, open concept floor etc. I know once we move out of this duplex we will make +/- $1000 a month in cash flow when renting our unit.  We are in doubt whether to buy another duplex in the area or to save up more money to buy 5+ units? If we choose that route it will definitely take more time b/c we have to save up.... I'm a little stuck. HELP!!!! :)