It's just because the place I have is worth double now than what I pay in rent so I don't blame them.

This could be a double whammy if you purchased to have an STR.  

I will have to double check but I believe they are licensed.

I think some of the newer construction is sitting well above current market value and could be in jeopardy if the market adjusts or the economy continues to fluctuate with inflation.Depending on where you live and what your comfort level is there are several other states that can offer a better cash flow for a similar price range.  

You might still be able to double close deals.

Good for them -- their house has about doubled. 

I read some where that I could sell the house to a 3rd party if I do a double closing and pay the owner what is owed to him and take my profit at the same time.

If he is producing double digit cash on cash, IRR, or annual ROI on a consistent basis kudos.

I was recently seeing an Instagram story about a $15k special assessment and a doubling of the monthly dues, due to underfunded HOA.

The overall goal is to do the traditional 'stack' over the next 5 years (duplex this year, double the number doors each year for 5 years, a la Multifamily Millionaire).