If you think you could achieve higher returns by reinvesting that equity elsewhere, selling might be the better choice.

Cash buyers are stepping back, with a 14.8% decrease, but the 57.6% surge in inventory means buyers have more choices than ever.

Take my advice for what it is worth - I ultimately decided not to invest there.

😀But I have to get to it since the right choice here doesn't seem to be that obvious. 

I'd suggest narrowing your choices down based on your long-term goals and what excites you most (sounds like hands on flipping).

It’s completely normal to feel a bit of analysis paralysis, especially when you’re in a position to make a move.The choice between a short-term rental (like Airbnb), long-term rentals, or a duplex comes down to your personal preferences and lifestyle.

There are many reasons why a cash out refinance is the better choice but there are a couple of reasons a Heloc can be used.

Same time, I can let her stay til the family find new home but afraid if she keep complain after lease is terminated.As I have another project, I am ok if they live quietly but what will be the choice if the lease is over and tenant still live there?

Without a diligent and responsive professional, touring, offering and closing on a prime investment property of choice is less likely.

Start by reading the Ultimate Real Estate Investing Guide: https://www.biggerpockets.com/guides/ultimate-real-estate-investing-guide/introduction2.