I'm assuming that Jerry Norton keep changing the name of his system.

That means that if you move to another area, your income could potentially change (up or down, who knows).

Meaning you may be able to do some cosmetic or smaller renovations like bathrooms or kitchens in your duplex when the tenants turn over and those smaller investments can demand higher rents, so in the longterm you may have more cashflow from the duplex to help fund a future investment in another property while you wait for market conditions to change.

Your goals change.

My lot is actually only 75' wide but was grandfathered into the zoning once they made the setback changes (neighborhood is late 1950 builds). 

Average tenants budget to their income and their income changes very modestly each year on average.

My gut feelings is that AI will bring significant change to real estate as it will to all aspects of our lives.  

For example, you could showcase the family-friendly amenities, outdoor spaces, and stylish interiors all at once, similar to the one shared here (this is a listing photo, so I would recommend you change the text to fit your guests).

Or in your case, maybe even change classes of property and use what's known as a consolidation exchange to combine the sales into a larger asset like a multi-family or commercial property.

When you do that, you can get better pricing and leaves less room for error.The best advice is to push forward as quick as possible, fail forward, and always continue to introspect on what you would do differently and then ACTUALLY go back and implement that change (easier to say than do).