Fill in the foundation below.Check out the Start Here page http://www.biggerpockets.com/starthere Check out BiggerPockets Ultimate Beginner's Guide - A fantastic free book that walks through many of the key topics of real estate investing.Check out the free BiggerPockets Podcast - A weekly podcast with interviews and a ton of great advice.

You can start with the course on the Ultimate Beginner's Guide.

Most tenants do not have an issue supplying them.If you are developing a tenant screening app you would need to remember who your customer is, the landlord, not the tenant.

Check this guide it may help https://www.biggerpockets.com/renewsblog/2013/01/27/tenant-screening/

We also had some customer service issues with them. 

https://www.biggerpockets.com/alerts You will get emails on topics and discussions which allow you to interact with other BP users.Be sure to check out the BP Ultimate Beginner’s Guide.

This is a great place to learn and meet fellow investors.Check out the podcasts , if you havnt already and you may want to check out the Raal Estate Agents Ultimate guide to working with investors.

Using your own money is your limitation.Check out the Start Here page http://www.biggerpockets.com/starthere Check out BiggerPockets Ultimate Beginner's Guide - A fantastic free book that walks through many of the key topics of real estate investing.Check out the free BiggerPockets Podcast - A weekly podcast with interviews and a ton of great advice.

There is a lot of information within this site that will help educate and guide you.  

., as a more informed potential client/customer than I would have been otherwise thanks to the BP community, and that was invaluable, and I know I've saved thousands of dollars as a result.