I can't imagine 'traditional/conventional' loans/banks being at all interested. 

She then began to claim items that were not part of the contract that she wanted done (ie. repaint her interior, fix her floors, and repaint an addition). 

Here is an article I would encourage you to read on Joint Ventures.Option 1: Traditional LLCFor this situation I would recommend setting up a regular LLC for this property.

The other response I received was that they had moved all of their items out the 14th and needed remove remaining trash and will give me the keys on Friday.

I have non traditional ways of getting around bad tenants if that problem arise.

For day to day maintenance, you can figure around 5% but CAP Ex depends on the condition and remaining life of your big ticket items like HVAC and roof.

Down Payment of purchase price: 10% (I know this varies depending on how you're doing the deal but if this is a traditional bank loan, what are the average percentages asked to put down?)

They certainly saw the rip in the screen, the holes in the walls during their inspection.Our lease has a clause to the effect that the tenant has inspected the property and is accepting it 'as is', EXCEPT for items that could not be observed during inspection, for example, water was off, so tenant could not see the faucet drip. 

I may ask the title company if they will at least close while not insuring that particular item.

We were able to itemize instead of taking the standard deductions on our individual tax returns while it was our primary residence, by deducting mortgage interest, taxes and qualified improvements, but then learned the power of the P&L and taking business deductions against the passive income to offset our tax liability.