Probably not a great idea...
This Investment Property Analyzer will put the important information at your fingertips. By helping you to quickly calculate potential rent, vacancy expenses, and all kinds of expenses you'd normally forget about, you'll be able to make a much more informed decision.
This includes Buy/Sell decision analysis, expense break down, as well as all the standard information such as debt service coverage ratio, total return, cash on cash return, return on equity.
You can easily visualize your expenses as a ratio of income (Remember the 50% rule?).
You can also easily print out the output and save it for quick reference.