You would have to come up with the funds to furnish, but you could probably get more than with a traditional rental. 

For my first investment property, since I do not have adequate funds for a down payment/do not qualify for a traditional loan due to insufficient credit history, I am seeking a partner to provide the down payment while I provide the deal. 

A few weeks after receiving her itemized deduction and remainder of deposit, she sent an email to dispute charges and threaten lawsuit again.

I don't have any expertise to give you, and certainly other members have imparted good faith advice, and some good should' ve-would've items that we all can learn from.    

For example being a real estate professional, how to treat losses from short term rental, Capital versus expense on common items, etc.

Real estate is a scarce item, it has to be rationed one way or another.

Failure to do this in some cases can make a landlord liable for double deposit in damages.The letter should itemize deductions:$850 deposit-$150 September Rent difference*-$150 October Rent difference*=$550 return*Tenant lease break charge. 

Traditional conventional mortgage for an owner occupied property.

I just now noticed that my suspended losses from prior years was not shown on the last 3 years of tax returns (Form 8582 Item 3c)… This hasn’t been an issue yet as none of the deals have sold, but they may sell soon and this will be a problem where I can’t use the losses to offset the gains.

B item is not covered under 6(A) as an acceptable exception.