I agree you generally need to seek out a lower priced area if you want it to cash flow. 

Lower unit is 3 bedrooms; upper units 1 bedroom each.

They are obligated to give their best efforts in representing your best interests - which yes could be a lower purchase price.

Converting a primary residence to an investment property can be done but you will probably have to accept lower cash flows.

Upper main roof first half replaced 8 years ago, second half replaced last year, and lower roof was replaced last month.4 Separate Crown Aruba Gas Boilers, regularly serviced and approximately 20 years old. 4 Separate Gas hot water heater (ages vary)Washer Dryer hookups available in basement for coin laundry for additional incomeExterior painted two years agoShingle sidingProperty just passed state inspectionReplacement energy efficient windowsPurchase Price: $210kAppraised Value: $285kProperty Type: Quadplex/Turnkey tenants in placeArea: BUnits: 1-3BR, 3-1BRRental Income: $3365 Per Month / $40,380 per year (rents can be raised 5% upon lease renewals)Utilities: Separately metered, each tenant pays their own gas and electricHouse Utilities: Common area utilities are about $20.00 per monthWater/Sewer: Landlord pays $1500 per yearProperty Taxes: $7855 per yearInsurance: $2500 per yearLandscaping/Snow removal: $1221.00Vacancy: ???

As others alluded to, I'd look into some longer-term loans (30 year amortization) and options with lower rates.

Usually the greater the financing, the greater the return as your investment is lower. 

The middle and lower class citizens will be priced out of expensive markets.

If you are much lower than that, you run the risk of going upside down very easily if any of your expenses increase. 

I also acknowledge I live in a lower cap rate / higher appreciation type locale so that can tweak the strategy slightly.