Thanks Dominic.

If you're buying a property to hold long term, the cash flow is the most important feature.

I like the search features: https://www.biggerpockets.com/searchAlerts can be really helpful too: http://www.biggerpockets.com/alertsThere are a few self-contained guides that you can access here: https://www.biggerpockets.com/guides

@Matt Daley I think Tellus works very well too and probably has all of the features you'll need.

I like the search features: https://www.biggerpockets.com/search

Throw a couple pot lights in the bulkhead while you’re at it and make it a less ugly “feature”.

I like the search features: https://www.biggerpockets.com/searchAlerts can be really helpful too: http://www.biggerpockets.com/alerts

This feature lets you link the register transaction to its supporting ducomdntation. 

When I asked about it he said there was a "insurance policy" like feature where if the rate goes down greater than a quarter point it will adjust the loan.

You can also buy lists from companies like list source and there are some REI software companies that have a cash buyer search feature.