Brrrr strategy on duplex with tenants, is this doable?

[Jason Harris]

I've been searching for single family homes in the southern Illinois metro area that I could invest in using the brrrr strategy. I have been struggling to find a property using the rule of thumb 70% rule because it seems like the arv and the price on these properties are so close not giving me the room to even consider, so I decided to look at some multi-family properties and found some occupied duplexes with a huge margin for example duplex with 2b1b on both sides in nice area close to schools parks and downtown area fairly new roof and some updates listed for 49k and arv 175k ,fully occupied. So my question is, is it possible to do a brrrr on something like this? Somebody please help me out...