Please feel free to contact me at http://www.SelectiveBuyer.com and I can take a look at what might be available. Short term rentals are typically pretty hard to come by - unless they are a pre-foreclosure that the owner is renting out month to month. Renting a pre-foreclosure would give you the flexibility you are looking for - however they come with their own set of inherent risks such as:
1. You could be told to move out anytime with 30 days notice
2. The owner probably isn't going to be very willing to sink money into a property they are ultimately losing, in the event something breaks.
Feel free to contact me directly, and I would be happy to send you anything I can find.
Licensed Broker, Prospect Equities Premier