Direct communication with the builder has been the most effective method in my experience.

However, this is not really effective in the real world.

By recognizing the signs and implementing effective preventative measures, landlords and property managers can protect themselves from potential scams.

There's some mis-information and mis-understanding of AP, the process and it's effect in this thread.

Are there any cost-effective ways to handle this situation legally?

If I have to buy a last-minute ticket or spend $1,000 or so for notarized signatures at a consulate, then it has a significant effect on my choices.

Hey everyone,I’m curious to know what strategies have been most effective for you when it comes to finding consistent, high-quality deals.  

The rules are designed to prevent related parties from engaging in exchanges that shift high basis property for low basis property, followed by a sale of the low basis property, effectively "cashing out" without recognizing gain.If you sell a property to a related party as part of a 1031 exchange, both you and the related party must hold the exchanged properties for at least two years following the exchange.

@Hamidou Keita I would recommend if duplexes are limited if you can get a 4-5 bedroom house and either rent by room for house hack or splitting a big house into 2 and adding a kitchenette and separate entrance as a more cost effective ROI option 

Our clients have used 1031 exchanges very effectively when they have a property that turns out to not be the right fit for them.