I figured the only holding costs will be the utilities. 

This strategy requires knowledge of local markets, renovation costs, and the ability to manage or oversee renovations.I am a loan officer and I could advise you on how to tap into that equity and put that money to work.

It helps accurately estimate the costs of purchasing, renovating, and selling a property, ensuring a clear understanding of potential returns.

Factoring in filing taxes, maintaining LLCs, and overall cost vs security, I’m hearing many different options. 

Can't recommend @Joseph Cornwell enough, he helped me buy my first duplex in Cincinnati and he has a contracting business, so he can give you advice on repairs, remodel costs, etc

Consult with a Financial Advisor: Seek advice to navigate negotiations and explore refinancing options that best fit your needs.By taking these steps, you can work towards lowering your interest costs while keeping your loan terms unchanged.

Just turn it off before it renews and that's all it costs you.2.

Personally 0- but I have been through quite a few low cost renter trashed units for sale.

In short , any rate/currency hike is causing liquidity crisis causing delay in ground up project even for project that was approved 2 4 years before the rate hike…. plus build costs/  profromas run 3 to 4 years ago are wildly in accurate

You can use an FHA loan with 3.5% down (That’s $7,000 cash out of your pocket) Then there are closing costs of a couple of thousand dollars.