For instance Sole Propertierships do business under the owners legal name but hide this by using a DBA. 

I was d4d today and looked up a house that had the owner named as a Trust.

You definitely don't want to donate your sweat equity to the owner or hard money lenders, so you may need to find a partner to carry the financing.

@Ernest Grindle I’m trying find out info about the property like the property owners address

The owners have evidence that they bought the land from the municipality of Carolina PR but they never add it to the hard copy of the property.Any advise on how to modify the hard copy or how to deal with this to be able to get the loan?

I have been reaching out to banks and previous owners of properties in a nearby area and a bank responded back on a property that that they currently have on the books to go to auction in the future.

@Jonathan Taylor, the Los Angeles City rent control scheme does have an exception for an intended, owner-occupied unit to allow for an eviction of that unit. 

Most folks do mailing lists to out of town owners and then slice the data from there.   

Looking to buy my first property which will be an owner occupied duplex in the state of Wisconsin.

Instead of a straight sale, the owner is rather selling 100% membership interests in the company whose sole asset is the property.