It provides an intuitive interface and a powerful calculation engine, which would be very costly for us to duplicate.But to make a tool that is both powerful and usable means we have to do a lot more that is not visible to the user as part of the familiar Excel skin.

@Jacob Cooper go to the tools section of this site, and find the files section.

I have a new tool now.

Use the resource tools at the top of the screen to get familiar with specific topics.

@Jason JonesI have to step in here and state that a Rollover as Business Startup (ROBS) plan does not align with your situation as you have described it at all.Those plans are for actively running a business, not holding passive income properties.This is a complex and expensive solution, and a great tool for certain situations and significant amounts of capital.  

You can go to the county Geographic Information System (GIS) or tax assessor websites, depending on size and sophistication of county, and you may find free tools available to search sales by neighborhood or zip code or price range and dates.

See my BP blog posthttps://www.biggerpockets.com/blogs/8070/51492-why-is-zillow-so-far-off-in-utah-what-is-a-non-disclosure-stateZillow is a great "first pass" data tool, but it is negatively impacted by Utah's status as a non-disclosure state. 

It will not work for every deal of course, but it is certainly a great tool to know about.

It will not work for every deal of course, but it is certainly a great tool to know about. 

I feel that is was a strong negotiating tool.