First investment property

[D D]

Hey all. After looking at about 50 properties over the past year I believe I may have finally found one in Phoenix, AZ. Here are the details:

Property type: Duplex
Purchase price: $35,000
30% down payment: $11,000 (rounding up for simplicity)
Loan Amount: $24,000
Debt service: $160/month

Monthly rental income per unit: $500 (minimum rental in that area)
15% maintenance
15% Vacancy (already have both units rented)
Monthly Water/Trash: $50/month
Taxes: $142/month
Insurance: $50/month

Using a real estate investment spreadsheet the numbers do not look bad but I would like to get some opinions on what I have missed. The units are move in ready so little repair is needed. Thanks!

Darek