This is just one small niche. 

Below are some links to get you started.https://www.biggerpockets.com/renewsblog/2013/04/09/how-to-buy-a-small-multifamily-property/ (How to buy a small multifamily property)http://www.biggerpockets.com/renewsblog/2014/07/19/how-to-buy-a-duplex/(guide to buying a duplex)https://www.biggerpockets.com/renewsblog/2015/11/16/how-to-choose-areas-multifamily-deals/ (Choosing multi-family deals) BP Podcast 061:How to Succeed in Multifamily Investing – A Unique Conversation with Josh, Brandon, and BenBP Podcast 131: Investing in Multifamily Properties in a HOT Real Estate Market with Serge Shukhathttps://www.biggerpockets.com/renewsblog/2013/03/07/profitable-ethical-landlord/ Much success,Jesse

Your time here will be well spent.Below, are some links that relate to buy and hold as your selected REI niche of interest.https://www.biggerpockets.com/renewsblog/2015/03/27/financing-options-rental-property-guide/ (financing options for rentals)https://www.biggerpockets.com/renewsblog/2014/03/06/bp-podcast-060-serge-shukhat/ (0-68 rentals in 4 years)https://www.biggerpockets.com/renewsblog/2014/08/02/passive-real-estate-investing/ (slowly building wealth through passive investing)http://www.biggerpockets.com/renewsblog/2013/01/04/how-to-rent-your-house/ (house rental guide)http://www.biggerpockets.com/renewsblog/2013/02/22/buying-rental-property/ (how to buy a rental property)Now that you have made the move, below are some links that will help with the navigation of the site. http://www.biggerpockets.com/startherehttp://www.biggerpockets.com/meethttps://www.biggerpockets.com/alertsHow to Use @Mentions on BiggerPocketshttps://www.biggerpockets.com/ruleshttps://www.biggerpockets.com/termshttps://www.biggerpockets.com/inviteshttps://www.biggerpockets.com/perkshttps://www.biggerpockets.com/forums/categorieshttps://www.biggerpockets.com/rei/glossary/https://www.biggerpockets.com/courses/a-beginners-introduction-to-real-estate-investing (video courses)https://www.biggerpockets.com/real-estate-investing (Ultimate beginner's guide to REI)Before your 1st purchase, please ensure you visit the below link for some tips.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 REIs)http://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?

This is just unique to me.5.

Jack,Each situation is unique and each should speak to you.  

You might consider Niche or Specialized Housing like student housing.

I've been looking into rental properites the most but house flipping also looks like it could be a good niche for me as well.

Scott The Book on Flipping Houses, The Book on Estimating ReHab Costs http://www.biggerpockets.com/flippingbookYou might consider Niche or Specialized Housing like student housing.

My workers live in the 900xx zip codes, they have first hand information on the movements for those zip codes, it's like a special niche, it might tricky but it could be done.

Scott The Book on Flipping Houses, The Book on Estimating ReHab Costs http://www.biggerpockets.com/flippingbookYou might consider Niche or Specialized Housing like student housing.