Can anyone help me,how to research area before purchasing the loan, I mean like the are is not dangerous, bed,ugly not many crimes.

It could be just as dangerous to be showing a home to someone you don't know well and lock yourself inside with them.

You just need a reference to a county where they have done business, then check their recorded documents to verify that their talk has some substance. 

The most dangerous situation is the landlord that owns 1 property.If you are midway between residential and commercial (5 properties) the insurance companies start considering you a risk and will only cover you with  more expensive commercial policies that require you to go to LLC's while LLC's might not be appropriate for someone getting new mortgages and has existing mortgages.What is the saying-go big or go home?

But please keep in mind that it's a very dangerous time to invest right now from a valuation perspective, given where we are in the real estate cycle and economic cycle right now, so be sure that you fully understand and are fully comfortable with any opportunity that you're considering (I am NOT a financial advisor, etc, this is just my perspective as an investor).

Buying with only one exit option is dangerous in any deal. 

To be considered, you are in imminent danger of default, you have no equity and you have no reserves to service the debt.

The danger in Lonnie deals besides Dodd Frank is that all applicants have to be screened and approved by the park office/ manager.  

If they had a car loan and was in danger of repossession, you'd want to buy at a big enough discount to justify the hassle of either paying off or curing the back payments.

The worling conditions mix danger, monotony, and lonliness into a lethal combination.