You cannot just buy any old mobile home park and succeed -- but you can buy the right park with the right attributes and, managed correctly, retire on just one property.

There was water leakage and damage in property's past which we 100% attributed to the roofs.

Having ANY rentals in a "9" rated school zone with low crime in neighborhood and surrounding neighborhoods with $100k of value and a 2% rent rate would be unheard of....I mean, you would be lucky to just have ONE of those attributes in a rental property. 

The rule of thumb is 45-50% of gross rents can be attributed toward Operating Expenses and Vacancies.

Sure, that was a Cat 5 and a lot of the damage can be attributed to storm surge vs wind, but why take the chance when you can find another house that's CBS?

If debt-financed real estate is acquired via an IRA, any income attributable to such investment will generally be subject to unrelated debt finance income tax.5.

One effective work around here is to use what is known as "Purchase Price Allocation" whereby you attribute a portion of the purchase price to NON-Real Property like customer list, seller good will etc...that can keep your property taxes in check.  

For first 2 months she paid 10+ days into month attributing to difficulty in setting up bank transfers or deposit and this month again she is late and not responding to email or calls or text.

Later studies have found no medically significant evidence of the link between mycotoxins and various illnesses attributed by scaremongers to it.Anyone who's interested can find evidence of this online.

You don't mention much of what attributes your friend will bring.