@Jeff Kennedy SmartMove by TransUnion is a popular one, however it does require the tenant to have an email address and be able to verify their identify on the site so that may not work with some of your tenants.  

Look at this it might help you out:  http://www.naahq.org/sites/default/files/naa-documents/income-expenses-survey/2013-Income-Expenses-Summary.pdf

However, I haven't done the best job at reading the forums or really diving into the web site.

Welcome to Biggerpockets @Raj Gott The BP Free Course here would be a good starting resource for newbies https://www.biggerpockets.com/courses/a-beginners-introduction-to-real-estate-investing

If not,go to the wholesaler and tell them you have a strongly interested buyer and you want a finders fee for the sale.10 to 15% of the wholesalers profit is fair.Unless you used your resources and information supplied by your brokerage (MLS,advertising from brokerage,etc), I would keep it under raps.If they didn't help make the deal happen,why pay them for nothing?

This site is a tremendous resource and can help you find all the resources you need.  

Even though it sounds like you're pretty savvy, you can still learn a ton from the real estate experts on the site.  

I'm loving the wealth of info on this site from all of you guys and gals.

This site has so many features that you can use to learn.

I am a Real Estate Broker And I have the strength and resources to help my clients receive the highest degree of personal and professional service.