The numbers look good:Location: Broadway HouseNumber of Units: 1Rent: $1,350.00 Square Feet: 1,666 Upfront Costs:Cost per Unit $95,000.00 Price: $80,000.00 Cost per Square Foot: $57.02 Cap Improvements & Repairs: $15,000.00Cash on Cash Return:19.84%Total: $95,000.00 Debt Coverage: [minimum 1.6] 1.78 20%Down: $19,000.00Capitalization Rate (ROI)9.05%Current Assessed Value: $29,666.00 Loan Amount: $76,000.00 Net Cash Flow per month: $314.08 Interest: 4.88%Net Cash Flow per month per unit: $314.08 Term (yrs): 30Total Rent/Month: $1,350 GROSS SCHEDULED RENTAL INCOME: $16,200.00 Less: Total Annual Debt Service: $(4,826.40)Less: Operating Expenses: $(6,470.63)Less: Vacancy and Credit Losses (7%): $(1,134.00)NET CASH FLOW: 3,769 NET OPERATING INCOME - (NOI): 8,595 INTEREST: 3,680 DEPRECIATION: 3,455 NET INCOME: 1,461 Property Insurance: $1,000.00 Property Management (10%): $1,620.00 Placement Fee(30%): $405.00 Real Estate Taxes (5.06179%) $1,501.63 Repairs and Maintenance (12%) $1,944.00 Services: Snow Removal: 720 Utilities: Electricity: N/A Gas and Oil: N/A Sewer and Water: $30.00/mo Other

Should save you quite a bit on gas over the years. 

I have 2 stacked units in a 2 family student rental ( 8 beds ) on one hand i wish i did not get them because i have been having to reset the machines ( have to have someone look at that) so in that sense i wish i didn't have them because of this maintenance, but if the Students lived in a dorm they would have to pay to do laundry and the local laundry mats are twice what i charge, it's more for convenience for them. the money i do get helps pay for the gas, water and the electric that the machines use as @Dale Stevens mentioned. i do not make money on them, but helps with the cost when the rental market is so competitive for student housing where this is.

Did they stress out over not having enough by spending an extra few minutes to depower the entire home before leaving or drive an extra ten minutes to save $0.08 per gallon of gas?

Roof still have 10-15 years left, new gas furnace, new ac unit central air.

It currently has heat only( original 50s gas furnace).

Another weirdness that you may or may not face...many of the homes were continually having big wet spots appear in/on the slabs, hundreds of people, were calling leak detection services, thinking an underground plumbing leak was causing these mystery wet spots.

And if you do bang on 5,000 doors you're probably going to spend a chunk of money in gas.  

One-time Expenses$1000 - Acquisition Costs (minor rehab, legal, & inspection)Annualized Expenses10% Gross Annual Rent - Vacancy Costs (turnover & lost rent)10% Gross Annual Rent - Property Mgmt (standard)$1176 - Repairs & CapEx ($1 per sq foot for tpical property)$1516.46 - Property Taxes (5 year historical average for typical property + 10%)$1000 - Property Insurance (a nice round number: seller reported that he paid $708/mo for one duplex)$27 - Water & Sewer (average across several properties from last month)$0 - Gas, Electric, HOA, Snow Removal (tenant pays or not applicable)$60 - Lawn Care (I made this number up)COMPARATIVE ANALYSIS:This is my analysis of the five properties that are being negotiated right now, listed from best to worst.Property Alpha (two-flat)$1250 - Income, Monthly (actual)$567.37 - Expenses, Monthly (estimated)$42,000 - Price, Signed Contract36% - Cap Rate (Annualized Income / Price)16.6% - ROI, After Tax (annually, assuming 15% income tax)6.0 Yrs - Until this property pays itself offProperty Bravo (two-flat)$1100 - Income, Monthly (actual)$537.37 - Expenses, Monthly (estimated)$42,500 - Price, Signed Contract31% - Cap Rate (Annualized Income / Price)13.1% - ROI, After Tax (annually, assuming 15% income tax)7.6 Yrs - Until this property pays itself offProperty Charlie (duplex)$1075 - Income, Monthly (actual)$532.37 - Expenses, Monthly (estimated)$55,000 - Price, Informal Discussion23% - Cap Rate (Annualized Income / Price)10.7% - ROI, After Tax (annually, assuming 15% income tax)10.3 Yrs - Until this property pays itself offProperty Delta (SFR)$875 - Income, Monthly (actual)$492.37 - Expenses, Monthly (estimated)$48,000 - Price, Informal Discussion22% - Cap Rate (Annualized Income / Price)8.8% - ROI, After Tax (annually, assuming 15% income tax)13.6 Yrs - Until this property pays itself offProperty Echo (SFR)$770 - Income, Monthly (actual)$471.37 - Expenses, Monthly (estimated)$62,500 - Price, Informal Discussion15% - Cap Rate (Annualized Income / Price)4.1% - ROI, After Tax (annually, assuming 15% income tax)24.4 Yrs - Until this property pays itself offNotice how the price keeps going up?

What are you TOTAL monthly expenses including gas, food, gifts, movies, mortgage, dinners out etc?