If you need a complicated surgery, that doctor is going to be expensive because of their skills and abilities to save your life.

A life span/cost analysis will show this.  

these can be a life saver. 

They can, BUT may pay dearly for it over the life of the loan1.

The process of flipping and rehabbing isn’t just about the renovation itself—it’s about having a clear, long-term vision for the property and executing it step by step to bring that vision to life.

It's normally the desire for immediate income that steers most investors towards bad investments because they are hyper focused on cash flow which is often portrayed differently in spreadsheets than in real life, and should be a consideration but not deciding factor.

If your PM is only on Zillow than you selected the wrong PM, they are classified as a BOOB...Shelter is a necessity of life and there for it will rent but it will often come down to price and/or condition.

Why not look at something that can be potentially life changing? 

I would not be surprised if this was a very well thought out plan that someone would move to another country that could avoid everything you mentioned while living there where ex pats are welcome and can live a wonderful life. 

He threatened me if I'm not paying him he gonna put lien on my property, I've never encounter these thing in my whole life...He seems very cold blood and likes to take his client to court or put lien on the property, looks like he had done these stuff many times in his career...I just don't suggest you to work with him for the below reasons:1.He is never willing to communicate about the project progress and he just notify you that you have to pay for next-phase otherwise he will STOP the work and take all the stuff out2.He will never take responsibility on warranty or the stuff he had done, if you ask, that is all your fault, and you have to pay your own bills3.Finally if nothing of these lightly threaten works, he will say: "I will give you 3 days, if you don't pay me, I will put lien on your property, I will take you to the court"I never done business into this situation in my whole life, but it looks like that's how Robert Mincey makes money and if you work with him, you will probably end up like me with tons of sleepless nights...If there are any chance, in the future I will post my whole experience while working with him.Hope this helps!