For the first part of your question even if you were working with a realtor, I don't personally know many that have a true pulse on rehab costs and I wouldn't make any investment decisions based on their rehab cost projections.My suggestion would be to study how to evaluate the Big 6 rehab costs: roof, siding, windows, HVAC, electrical, and plumbing. 

I wouldn't buy something I personally wouldn't stay at.This will be too much work for too little money.

If possible, notify the renters simultaneously and do it in person.

Lessons learned/things to avoidThank you again Whatever you do find a independent boots on the ground person that's not tied to the realtor, contractor etc

@Kristin Boekhoff I generally buy larger multifamily properties, so I don't have any personal recommendations, but I did check with my insurance broker. 

because my post required a knowledgeable  person regarding the OK law. 

I'm currently flipping and have found a person looking to sell two properties that are both within an opportunity zone in CT.  

Mobile homes in a park are still taxed as personal property and the cost is anywhere from $50 to $200 per year.

I'm personally a fan of the mid-term. 

It is not my requirement to prove it came from elsewhere.It would be more effective to work with the HOA to confirm the actual source of the leak, rather than requiring me to disprove an assumption.In future For issues like this, I suggest contacting the HOA first, as they can coordinate with both of us and identify the source instead of making assumptions.and make our communication smoother.You're making it personal and overthinking it.