6 units building with $101K annual rent. Is it a good ROI?

[Yanto Njam]

Hi,

I have 6 units building that was purchased for $780K in Chicago area. Bought it early this year and bumped up the rent from $82K/year based on the previous owner to $101K yearly rental income. 

The property tax is about $9,300/year. 

Water and Garbage about $6,000/year. 

Electricity about $360/year. 

Landscaping maintenance about $2,000/year. 

Repair maintenance about $8,000/year

Insurance about $2,500/year

Gross Net about $72,840/year

Please let me know if this is a good ROI and if it is wise to keep it for a long term with this ROI? Any input or suggestions appreciated. Thanks Yanto