I've been educating myself with videos and articles but this is my first time and I don't want to make a huge wrong decision.  

If the seller constructed the units on your property, then I assume some sort of building plans would have to have been submitted to the appropriate authorities in the city, and in that case you should try to examine the building plans to see if the plans for connecting the sanitary waste were followed.One investor I know is considering adding video camera inspection of sewer lines to his normal routine pre-purchase inspections, so that he can identify in advance a big ticket problem for just a few hundred dollars up front.

I particular I have (based upon the advice and input of others) created a Screening Criteria with scoring to help applicants know how I select the most appropriate renter as follows (please advise if you think I should make changes):Rental Application Screening ReportInterview: House showing: Walk-through of property: In person 5 pointsUsing licensed realtor representative with FaceTime or equivalent 5 points Using licensed realtor representative without FaceTime or equivalent 3 points Other: 0 points On time for appointment: 5 points Running late, called to inform: 3 points Late: 0-10 minutes 2 points 11-20 minutes 0 points 20+ minutes- landlord leaves, applicant rejected Respectful and courteous: (subjective, score -5 to 5) To landlord: To each other: *Cursing, swearing, pushing, shoving, and violent behavior, demeaning speech or treatment of landlord or landlord’s agent or to one another: Applicant rejected Neat/Clean appearance of all parties: 5 pointsApplication: Filled out application entirely leaving no blanks: Yes: 5 points No: -5 points, grounds for rejectionPaid for application fee?

what about video?

BTW, I saw your 3 videos on how to do lease option assignments on the phone, and that's what I want to do.

I am extremely green, but I have been studying, watching videos and paying attention over the years to real estate programs and local transactions.

While searching youtube for cash flow videos - I came across Brandon Turner's video on a 5-plex find.

May Hall alright thank-you I will check this video out and take heed to those little tips you gave me when going to look at properties

Recently in 2015 I have been attended multiple seminars, video conferences, lectures, classroom type events, and tons of other things expanding my knowledge base in real estate.Plan on doing business in Phoenix area expanding to Flagstaff and Prescott as opportunities are discovered.

I received this info from @Nathan Sharp when I first started.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)https://www.biggerpockets.com/renewsblog/2013/11/02/hack-housing-get-paid-live-free/ (House hacking)https://www.biggerpockets.com/renewsblog/2014/03/13/investing-multifamily-ben-leybovich/ (Podcast 061 - How to succeed in multifamily investing)https://www.biggerpockets.com/renewsblog/2013/04/09/how-to-buy-a-small-multifamily-property/ (How to buy a small multifamily property)https://www.biggerpockets.com/renewsblog/2015/11/16/how-to-choose-areas-multifamily-deals/ (Choosing multi-family deals)http://www.biggerpockets.com/renewsblog/2014/07/19/how-to-buy-a-duplex/(guide to buying a duplex)https://www.biggerpockets.com/renewsblog/2013/12/12/bp-podcast-048-duplex-managing-tenants-darren-sager/ (Duplex investing)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/webinarhttps://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/?