Seller seems pretty motivated (i.e. flexible) and has nothing to lose by working with me to get this thing closed, rehabbed, and cash flowing again, so perhaps he will entertain some creative techniques to get this done.David, or anyone else, can you give me some more guidance on the owner financing terms I might go back to the seller with?

I look forward to building bridges to connect me with relationships that can only enhance my ability to ensure success!

Did you get creative with your purchase or pay all cash?

I did do a 15% down payment on my first home but did 'creative financing' on my last deal and the one I'm working now.

Now that you've dealt with a problem, figure out a way to ensure it doesn't happen again by taking the advice of others and installing a procedure.

This is always a good way to ensure that you get the type of people that would like to be living in your property.

any creative ways to use the current owed taxes to lower the selling price? 

I typically recommend planning $200,000 to $250,000 for an ADU above a 2-car garage, but creative construction methods, owner involvement, and careful selection of finishes can help to bring that cost down.  

I received this info from @Nathan Sharp when I first started.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/?

He's open to something creative, rather than taking the windfall of a typical sale.My goal is to obtain the property and maximize the value for myself and my dad.