Gordon is the owner, I doubt whether he could completely hide behind his LLC to protect personal liability. 

I guess really you’re not paying it, the owners are.

The current owner listed last years income as $51,000, but currently has rents at (for the five separate units): $650, $750, $800, $825, $1125 (the math doesn't totally add up so maybe he changed a rent payment at some point). 

Most banks don't really know how to do that because they cater to SFH owner-occupants. 

The previous owner took exceedingly good care of the building and there was nothing that need to be done except to raise the rents.

Now consider this: all the groups people are spending fortunes to target—foreclosures, absentee owners, probate leads, tax liens—what do they have in common?

However if you are looking at commercial properties a lot of them will be owned by corps and then it will still be hard to find the actual owners!

Look up the rental laws in Portland, it is a NIGHTMARE for property owners.  

What are other ways to get this property with out having to owner occupy, FHA, conventional?

If you could do it differently, owner occupied is easiest to get a HELOC on and has the lowest interest rates.