[rverghes]

I worked for a small real estate company for a couple years, developing a software solution for them.

The biggest problem is that real estate is very "exception-based". I.e. There are no "absolute" rules. Every rule you can think of will have an exception somewhere that you have to account for. Some of these exceptions may even contradict each other. 99% of properties will follow any given rule, but 1% of properties will not.

In some respects, this is why Excel is perfect for real estate. You can pick a specific row, and adjust that row for that specific property's exceptions without altering the other deals above and below.