So my question is how do I go about presenting the owner with a seller financing option as I'm trying to get this duplex with no/low money down?

I also second the video comment above. if the unit is abandoned your local laws may state that you have to store any items left behind for a period of time. your video is proof that the unit is empty and they did not leave behind their "expensive family diamond collection" which they would sue you for if you have no proof.Once you have new renters in there, document the days you lost rent and take them to small claims (if the amount is low enough). once you get a judgement you can try to collect from there.

I personally think vacancy at 5% is too low; it basically means the property is only empty once every 24 months.

If you can get a low-ball offer accepted, though, you are potentially adding value. 

We had a hard time and they said no because my baby daddy (together for 17 years, just not legally married) just bought out his business partner and didn't have the business in his name 100% for 2 years (never mind that he started to company 10+ years ago) and our credit scores weren't superb at the time, low 700s. 

You won't be able to refi and get your money back, so make sure you're satisfied with the COC return.I'm skeptical that it needs $0 repairs.Vacancy and Cap Ex might be a bit on the low side, I don't know your area.

Low income tenants, with the father working and the mother staying at home with the children.

@Brian Trickett  I think you hear about the DE and NV LLC's because those are "Corporate Friendly Havens" that have low fees for Corps and LLC's. 

It's a nice property and my guess it would sell within a week, maybe 2 (very low inventory in district)Although we bought in Sept. we completed it in January. then had more important things to tend to over the past few months. 

All while I am still working or making another run to Lowes.