FYI -- In addition to the $495 Professional Edition that Michael mentioned, my company realdata.com offers a $159 Express Edition which is geared more toward multi-family property.

We run a professional business.  

Information is very important - asking the right questions and knowing how to respond to responses will mark you as a rank amateur or professional who knows what to do and how to get the the bottom line quickly and close a deal.

Then hire a company that does turnkey operations for foreign investors.

Hire\Find a Team that is willing to help you that is both local and experienced.  

However, those holding a professional license should call it as it is; a "Sale Associate" or a Real Estate Licensee.

The operating company rules in connection with real estate must be satisfied so make sure to work with competent compliance professionals if you decide to pursue the use of 401k rollover funds to finance a start up.

Focus on income productive things and hire out everything else.  

I have also had good luck with the county reports however, some counties are still living in the dark ages so you will have to hire a company to pull it for you.

I wouldn't hire an appraiser.