The unavailability is a favor to you - - find another source that is reliable & accurate :)

Also, the proposal that @Jay Hinrichs made wasn't a bad one given the numbers (and the fact that you don't currently have any alternatives).But, I'd be willing to bet that if you get an inspection that indicates that the house is in good shape, and assuming your $900/month rent estimate is accurate, you should have no problem finding someone to loan you the money or partner with you. 

How accurate is that?

Be sure to get the difference between conversion and new construction to have accurate numbers. 

That being said, if you use callrail to route your calls to your phone you will also have a record of everyone calling you including their first and last name (it has a very accurate caller id) and their phone number. 8/10 times I am able to take that name and do a search of my spreadsheet I used for mailings and determine who called me and what property I had mailed about. 

Without vast experience in rehab its hard to ACCURATELY forecast a rehab which could leave you underwater or out of money to complete. 

Also, as @Mindy Jensen mentioned, Zillow isn't the best tool for accurate values or information on properties.

Every site I visit has different numbers for the same cities in the same year.I'm wondering if anybody knows of a site or resource that can show accurate, up to date demographic information that includes job growth, population growth, trends and the such for individual cities and outlying areas.

Does the water, gas and electricity numbers look to be accurate?

Zillow estimates are as accurate as Taco Bell is to Mexican food.