The elders said no and treated me like an evil person.

Yes, you may be required to make some reasonable accommodation but if it's the type of shower I'm picturing they appeal to the elderly and nobody else.

The ferrets are "elderly," very old and moving slow so I told them they could keep them as they are now - caged in the basement as long as they don't let them loose in the house. 

My father and I purchased a property 2 years ago cash. At the time of the purchase the property was deeded solely to his name. I would like to now transfer the deed to an LLC, in my name, while doing a cash out refina...

You are correct - if she lived and owned the home for the last 2 years - she is eligible to exclude $250,000 of gain from the sale of her home.I am not to familiar with financing for the elderly...but if she does not make a lot of money; she might not be able to find a bank that will do a cash-out-refi.Does she earn money from a retirement account(401K, IRA, etc) and social security?

For example, if the owner is elderly and show proof that she gave someone money to pay taxes, and the person didn't, then the courts will be lenient.

The owner is elderly and has intimated to a few folks that she might be willing to sell the building if the buyers approach her properly (lawyers and such).It's vacant due to a structural concern vacate order by the city, so it needs repair.

The current family had elder people living in the unit since they bought.

I would also look for a unit which is a little tired (i.e elderly owner or estate) which you can obtain at a discount to the market and clean it up yourself to rent ... lowering your cost basis in the process.You might consider skipping the second condominium and proceeding directly to a duplex/triplex/quadraplex.  

This property is a family property and until recently it was managed by my elderly uncle.