Below are some quick links to get engaged on this site. http://www.biggerpockets.com/startherehttp://www.biggerpockets.com/meetSetting up Keyword AlertsHow to Use @Mentions on BiggerPocketshttps://www.biggerpockets.com/ruleshttps://www.biggerpockets.com/invitesREI books suggested by BPershttp://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?

A few notable ones: https://www.biggerpockets.com/forums/311/topics/113694-50-percent-rule-in-my-worldhttps://www.biggerpockets.com/forums/48/topics/227168-50-rule-fiction-non-fiction-lets-see-for-37-491-sfrThe second link looks at a SFR hedge fund and their numbers.

Ok, now that you have taken your initial step, below are some quick links to get engaged.You mentioned three niches of interest and as such I added the guides for your review.http://www.biggerpockets.com/renewsblog/2013/02/22/buying-rental-property/ (how to buy a rental property)http://www.biggerpockets.com/renewsblog/2014/01/07/flipping-houses/ (step by step guide to flips)https://www.biggerpockets.com/renewsblog/2015/01/31/ultimate-beginners-guide-real-estate-wholesaling-2/ (Ultimate beginners guide to wholesaling) http://www.biggerpockets.com/startherehttp://www.biggerpockets.com/meetSetting up Keyword AlertsHow to Use @Mentions on BiggerPocketshttps://www.biggerpockets.com/ruleshttps://www.biggerpockets.com/inviteshttps://www.udemy.com/biggerpockets-real-estate-investing-course/ (video with 64 lectures and approx 6hrs of material)https://www.biggerpockets.com/real-estate-investing (Ultimate beginner's guide to REI)REI can be very daunting, but, before you go searching for that 1st buy, please take a few minutes to bone up on the tips in link below.https://www.biggerpockets.com/renewsblog/2014/12/19/real-estate-investing-success-smart-tips/REI books suggested by BPershttps://www.biggerpockets.com/renewsblog/2015/11/13/7-real-estate-books-beginner-investors/ (7 absolute must read books for beginner REI)http://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?

Thanks for helping me out and supplying information and the link.  

Below are some quick links to get engaged on this site. http://www.biggerpockets.com/startherehttp://www.biggerpockets.com/meetSetting up Keyword AlertsHow to Use @Mentions on BiggerPocketshttps://www.biggerpockets.com/ruleshttps://www.biggerpockets.com/invitesREI books suggested by BPershttp://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?

Brandon's book (linked below) goes into this and many other strategies and really helped me figure out the best option for me.Good luck though! 

If they want to contest the charges, I usually provide them with a copy of the video/pictures (by email or YouTube link) and a letter detailing how they can submit a written request for review.

@Paul Donoghue, thank you for those links.  

Here's a link to assist you.  

Happy  to  discuss further  and  send  some images  or a  link  to my  facebook  album.