If you're in Northern MN, there is a very good chance that the cost to build a new duplex exceeds the resale value, which would be an awful idea to build a new one. 

Keep detailed records of repairs, improvements, and rental income, and consider working with a CPA specializing in real estate to ensure you're taking full advantage of deductions and strategies like passive losses, home office deductions, or even the Qualified Business Income deduction if applicable.Good luck!

With commercial office space starting to return, I am interested in establishing a syndication group that would be willing to invest capital into commercial office buildings.

If you go through brokers or even reaching out to sellers, it's a good idea to keep in mind how they will see you.

I had listed a 10-unit property in Cincinnati, OH, and found a buyer through an agent from a different office.

If not, call the S8 office and ask. 

I think investing out of state in a D area is a bad idea.

Some lenders offer creative solutions, like a cross-collateralized loan, where they use your existing equity as security without refinancing the duplex.Another idea is partnering with private lenders or exploring a second-position mortgage, depending on your lender's terms.

I have an idea of an initial investment and returns I would like to hit, but would love to speak with those of actual experience to see if my numbers are realistic.

Property taxes and insurance costs are best obtained through local county websites or reaching out to insurers directly for quotes specific to the area.Tools like BP Pro and Reventure can be helpful for an overview, but it’s a good idea to validate their data against primary sources to ensure accuracy.