NOI Analysis for Duplexes

Here is the NOI analysis for each group of duplexes. If I've err'd in my calculations, PLEASE let me know. :)

Group #1

Property Information
List Price:	$ 119,000
Income
Gross Potential Rent:	$ 1,146.00
Vacancy Factor:	$ 95.50
Gross Operating Income:	$ 1,050.50
Expenses
Management Fee:	$ 103.14
Maintenance Reserves:	$ 57.30
Property Taxes:	$ 243.67
Insurance:	$ 49.58
Utilities:	$ 0.00
HOA Fees:	$ 0.00
Other:	$ 11.46
Total Operating Expenses:	$ 465.15
Net Operating Income
Net Operating Income:	$ 585.35

Group #2

Property Information
List Price:	$ 109,000
Income
Gross Potential Rent:	$ 1,210.00
Vacancy Factor:	$ 100.83
Gross Operating Income:	$ 1,109.17
Expenses
Management Fee:	$ 108.90
Maintenance Reserves:	$ 60.50
Property Taxes:	$ 237.57
Insurance:	$ 45.42
Utilities:	$ 0.00
HOA Fees:	$ 0.00
Other:	$ 12.10
Total Operating Expenses:	$ 464.48
Net Operating Income
Net Operating Income:	$ 644.69

Group #3

Property Information
List Price:	$ 145,000
Income
Gross Potential Rent:	$ 1,502.00
Vacancy Factor:	$ 125.17
Gross Operating Income:	$ 1,376.83
Expenses
Management Fee:	$ 135.18
Maintenance Reserves:	$ 75.10
Property Taxes:	$ 338.65
Insurance:	$ 60.42
Utilities:	$ 0.00
HOA Fees:	$ 0.00
Other:	$ 15.02
Total Operating Expenses:	$ 624.37
Net Operating Income
Net Operating Income:	$ 752.46