Help me analyze this deal in Brooklyn NY

[Sal NA]

I came across an interesting mixed-use property deal and wanted to get some insights from the community on how to approach it. Here are the key details:

• Property Type: 5-unit mixed-use building (2 retail, 3 residential)
• Asking Price: $5,200,000
• Building Size: 4,526 SF
• Lot Size: 1,573 SF
• Air Rights: 4,939 SF available
• Location: Prime area, corner lot, close to public transportation and major attractions
• Financials:
  • Total Annual Income: ~$359,305
  • Net Operating Income (NOI): ~$278,686
  • Existing Debt: $4.375M @ 4.28% (assumable, maturing 1/2031)
• Rent Roll:
  • Retail tenants with leases extending through 2024
  • Residential units are all 3-bed/2-bath, free-market, with luxury finishes

I’m trying to figure out how to best analyze this deal and determine if it’s worth pursuing. This is my first deal involving assumable debt.