If you have family get them involved...sell FB marketplace and eBay for a year and they can do that from home.   

First sell off things you dont absolutly need .

If you are not attached to the duplex, could be a good time to sell to developers who want to convert to individual condo units.

When you do a 1031 exchange you are selling investment property and you must buy investment property. 

Just another mentor wannabe trying to sell their services. 

Providing relocation assistance to tenants, for example, if I want to sell the property or move back in - this can range from one month's rent to thousands of dollars (e.g tenant has a disability, minor children, elderly it will cost you more), depending on the city.

Blackstone just lost $1Billion selling motel6 to Oyo. 

Ideally a HELOC is used for less then a  year project where you can refi or sell to pay back the HELOC. 5 years is a long time, things can happen and if you reduce the cashflow on both properties you'll be increasing the risk and having thinner margins.

Quote from @Chris Seveney: Quote from @Devin James: In 2021, we saw buyers upgrading to larger homes, taking advantage of 3% interest rates to afford an extra 300+ square feet.Today, smaller homes are selling much faster as higher rates make additional square footage less affordable.While rates are historically average, I don’t see them dropping significantly.

That's going out and getting a brand new car with the expectation that you could sell a depreciating asset for more than what you paid for it.