please help me analyze this property

[Danette DeRose]

hi all i am so lost trying to analyze this please help its 3 homes on 1 lot all single family 

DETAILS: * 506 3rd Street: 1,465 Sq. Ft. / 3 Beds / 2 Baths Central Heat & Air Conditioning One car garage
510 3rd Street: 1,023 Sq. Ft. / 2 Beds / 1 Bath Central Heat & Air Conditioning Two car garage / Fireplace
214 E Street: 1,253 Sq. Ft. / 3 Beds / 1 Bath Central Heat & Air Conditioning One car garage / Fireplace                                     

all 3 in place tenants asking price is 649,000 monthly rents = 3,600

all great condition very minor rehab will get 1,100,000