Just last night I was reviewing the numbers on Sandicormls.com.I am currently working on a model in excel and using DealCheck app.

Quick note since you're doing real estate related software: Go make some decent mortgage origination software (not marketing software, not a cell phone app -- origination software).

@Eddie Wright Download the MeetUp app and find local REI meetings.

As far as rents, you can see what is listed for rent on Zillow or spring for a rental app that will aggregate all the information and give you averages in the area.

Eg they borrow at 4% and receive say 7% giving them a profit of 3% for no money down but a little time for the loan app plus the risk associated with repaying the loan if it goes belly up - though with 20% of my cash down the risk is low for them.  

Good luck on your web development app.

I also am a huge podcast addict (also the name of my favorite podcatcher app). 1.5x speed, more info in less time except for music and motivational.80% is investing (BP, CFD, a few others that are just okay so far), 15% marketing (various), 5% music, motivation (Brendon Burchard), and personal interest.I'm going out on a limb here with this one, but I enjoy listening to Simon Black on Sovereign Man.

I use mobile apps such as Redfin and Realtor.

I've used the thumbtack app to get a lot of subs out to a house, and a couple of them have worked out well.  

We have used big banks and the features with the banking apps are great and timely.With the smaller banks you have more of a personal relationship with the banker.