Is this a good deal?!

[Dung Nguyen]

Hi BP community!

I have submitted an offer for a three family in a pretty decent neighborhood. It is 3150 square feet, it has 8 bedrooms, three bathrooms, brand new siding, brand new roof, four off street parking spots, updated electrical, and all new windows. The first floor rent is below market price at $975, second unit is vacant, third floor rent is $800. Rent could go as high as $1200 for that area. The annual tax is $3750, the annual insurance is $1300, water and sewage is $200 per month, and basement washer and dryer takes coins.The work needed inside the units are mostly cosmetic where I can do some things myself and whatever else won't cost too much. I'm thinking less than 15k for all three units.  The asking price is 310k and I offered 340k with 8k back for closing costs. Is this a good deal and do you think I made a good decision? I ran all the numbers through the BP calculator multiple times and the numbers make sense. All feedback is welcomed. Thank you!