I’d lean Stessa assuming you’re not house hacking. 

new houses are getting sold for 600K, old houses switched to multiple offer selling model, just like some places in GTA.

You could tell them to cancel the listing and you will find someone else to list it after a month not 4 months (the market take is subjective too, all dependent on what your house has compared to others, where it is located, the size of it, and so many other factors).

And your money is Trapped inside your house. 

House hack another property with a low down payment loan and use the remainder or the proceeds to either renovate or purchase another investment property?  

As for valuation, I see no reasons why a Junior ADU would negatively impact additional housing unit.

Local Investment StrategiesHouse Hacking: Given the affordable entry prices, Albuquerque can be a great place to start house hacking, especially near the university areas.BRRRR: For those familiar with the Buy, Rehab, Rent, Refinance, Repeat method, there are opportunities in Albuquerque to purchase under-valued properties, especially in areas undergoing gentrification.Airbnb/Short Term Rentals: As previously mentioned, the city's rich cultural appeal can make certain properties lucrative for short-term rentals.

I went and checked out one of their houses recently for a flip.

What do you do when in house goes on vacation? 

But after working with him, I realized he was very systematic and mostly cared about closing deals without much care for the client's long term needs.Here’s an example: I had a $10K escrow with the seller—$5K due upfront and $5K after the inspection.