If you are serious about the purchase then I would validate it for myself (taxes based on your purchase price, rental comps to rationalize revenue projections, etc). 

Using my arbitrarily choosen subject property I could validate that your numbers are feasible, though for my case $220k seemed about $45k too high.

Further, our firm also has negotiated over a billion dollars worth of oil and gas leases.

The properties is class C and neighborhood class BTotal building square footage: 48,513 sq ft,  built  in 1947 Listing Price $1,800,582.5 0.095 OPERATE INCOME Annual % RENTAL UNIT INCOME $363,504 0.05 Vacancy 5% $18,175   GROSS OPERATING INCOME $345,329     OPERATING EXPENSES   Advertisin $272   Trash Removal $1,320   Management 8% $29,080.32 0.08 Supply $16,611     Landscaping/Snow Removal $1,866     Replace/Repairs/Supplies/Maintenance % $30,825.14 0.0848 Water/Sewer $19,214   Utility House Gas/Electric $10,924   Real Estate Taxes $54,100   Insurance $10,061   TOTAL EXPENSES $174,273   NET OPERATING INCOME $171,055   LOAN WITH 20% DOWN $360,000 $1,800,000 DEBT SERVICE (1) ($97,524.99) 0.2 DSCR $1.75   CASH FLOW $73,531   CASH ON CASH RETURN 20%  I add 5% for Capital expenditureand vacancy rate to 10%, now the Price about 1.5M VALUE $1,494,473.9 0.095 OPERATE INCOME Annual % RENTAL UNIT INCOME $363,504 0.08 Vacancy 10% $29,080   GROSS OPERATING INCOME $334,424     OPERATING EXPENSES   Advertising $272   Trash Removal $1,320   Management 8% $29,080.32 0.08 Supply $16,611   Landscaping/Snow Removal $1,866   Cleaning/Maintenance   Repairs/Supplies/Maintenance % $30,825.14 0.0848 Water/Sewer $19,214   Utility House Gas/Electric $10,924   Real Estate Taxes $54,100   Insurance $10,061   Reserves/Replacement 5% $18,175 0.05 TOTAL EXPENSES $192,449   NET OPERATING INCOME $141,975   LOAN WITH 20% DOWN $300,000 $1,500,000 DEBT SERVICE (1) ($81,270.82) 0.2 DSCR $1.75   CASH FLOW $60,705   CASH ON CASH RETURN 20%  ThanksLong Khang

The other day I wrote about the oil & gas sector from an industry insider's perspective.

so cap expenses should be minimal for some time.He currently pays for electric, gas and water. 

With the cost of living 2.5 percent below the national average, from groceries to gas, utilities, and housing, Kansas City is one of the most affordable cities in the Midwest.

@Keith ChanAll valid points below.

That's where I have been leaning but wanted some validation.

The unit is rented out rent now its 5 units total is $3410. the home costs 110k. seller provided monthly gas and water/sewage (400 and 600).