If someone buys a condo unit at auction where the unit has a leak that has caused damage to the unit below is the new owner responsible?

I was hoping to find an agent who filters out properties that don't make sense from a cash flow perspective unless there's a value add possibility. 

Below are some additional ideas I have to come up with my 20%:Interest only debt partner with a healthy interest rate (roughly 10%) for 3 years.Using another property I have (7 Unit) as collateral.

I recently raised my rent on a tenant by 150/mth but upon investigation I was below market by 250/mth  I realize it was a big jump for them but they had had several years below market and I was increasing it still to slightly below market. 

I will let you know if I find anyone below 25

In the picture below, the property is outlined in blue and the gas station in red.From an environmental standpoint, is this too close?

Below market rents, poor management, 83% occupancy, good location.How did you find this deal and how did you negotiate it?

The link to the article is below if you guys want to take a look. https://www.biggerpockets.com/blog/2014/12/03/30k-rental-property-real-estate-profit-finance-cheap/

@Chris TaylorAlso, keep in mind that many insurance companies do not offer replacement cost if you insure below 80% of replacement cost. 

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