Advice On Ohio 12 unit

[Charles Worth]

I am a new RE investor in Ohio looking putting an offer in on a 12 unit building in Clevland Heights and wanted to see if I missed anything. The property is that is 92% leased up on 12 month leases (expiring in 6 months or more) and in good condition. The price is $259,000 with the following assumptions (per year):

the rents  $69,920 ($485.56 per month per unit with my 5% vacancy provision), 

taxes are $8,640, 

Insurance is $3,758 and 

historical other expenses are $20,970 (after taking out general repairs).

I put in an extra $500 per unit in R&M and capex expenses for $6,000 per year

I also budgeted an extra 7% of rents for property management and $3,960 for leasing fees. 

A 75% LTV mortgage has interest payments of $9,692 @5% and paydown of $6,957.42

This results in total expenses of $48,222 and a before financing NOI of $21,698. After financing NOI is $12,006 and post-debt paydown cash flow is $5048.49 or $32.36 per unit while returns come in at 16% cash on cash based on the ask and 19% based on the 5% or so discount I will try and purchase it at.

Did I miss anything? Does this sound like a good purchase?