Instead of continuing to hire remediation contractors you should hire a hygenist to come in, do some testing and provide a remediation plan.

Both of you provided important information.It's true @Jason Wray that Florida is always a hotspot.

@Tom OchiengI would reach out to a real estate attorney for specific advice on this situation since you already have one tenant who is being difficult.On a side note, when I have inherited tenants, I have been most successful when I have provided longer non-renewal notices, like 60-90 days, and offered to assist with moving costs.

Can you provide the address of SFH with ADU & JADU additions?  

She spent countless hours on the phone—with me, the city, contractors, and other key players—to help find the best path forward when she didn't have to.What I Learned:Insurance is your safety net: Always double-check that you have the correct policy for your project type. 

That document they provided, with all the colored font, was a mess to wade through.

But what it does provide is a framework.

I thank you in advance for taking your time to provide us with your knowledge 

Pick the amount of income you want real estate to provide you, and buy the amount of units you'd need, such that if they were paid off, you'd hit your goal.

Quote from @Steve Lehman: @Jackie LiuFirst and foremost the information that everyone has provided has been great.