210 Mercer St. Is a fully occupied duplex located in Butler. The property is 100% occupied and consistently leased, generating $4, 650.00 in quarterly rental income, or $18, 600.00 annually. With a strong and reliable income stream, the duplex produces an approximate Net Operating Income (NOI) of $15, 548.36 per year. Its central location and stable tenancy make this a solid investment opportunity with dependable cash flow.