What methods would you suggest to screen potential tenants? 

There are different ways to refinance and get cash out.

The builder offerred $15,000 credit to be applied, however you wished EXCEPT can not be used for price reduction. 

Interest rates doubled within a six month period of time and property sales almost completely stopped. 

Very cool- awesome to see the ambition!

You could form a month to month lease with a just a days notice to vacate so you could end it as soon as you get your license ready to close, the seller might be open to it.https://www.hostaway.com/blog/rental-arbitrage-joshua-tree/Or, you could continue to list on the seller's Airbnb and you could become a full-access co-host on their account - handle all communication, pricing, etc.

Without any cash it is unlikely unless you can find a 100% seller financed deal (they do exist, I just did one a few months ago).

Welcome to BP Frank and best of luck investing!

Good Morning DeniseI know it has been several months since my last correspondence with you in regards to this quiet title matter however I again need advise/direction. 

We only have one small property, so I manually adjust the price based on what I see for the month.