Extremely stressful but I will definitely fire this Pm. 

You are dealing with your first eviction/rehab but if that happens again in 6 months and it takes months to evict will that financially stress you?

Several people have already mentioned some of the reasons:Successfully hitting a target in a high stress situation is very low probability.

But you sound stressed (you should be) and without a way out.

If he's dragging his feet, it might be time to set a deadline for his answer and line up other options to avoid last-minute stress.

I've rented it out before but with my full time job, managing two STR's is a bit stressful and hard to sustain so looking for other options.

On the flip side to investors , other than the obvious advice to do your due diligence and stress testing seriously, also do the important work of self assessing your own true risk tolerance, ultimately defined by “are you comfortable losing it all” in a particular investment or asset category.  

It allowed him to keep the money he was willing to use for a down payment for emergencies, which made life as a homeowner less stressful.

I started to scale back on my comments, partially because real estate for me has gotten very stressful and I'm taking a break from buying anything.

And it sounds like this deal is stressing you, so time to move on in my humble opinion.