Is BRRRR risky with duplexs?

[Dori Arazi]

I'm working on BRRRR deals in Fort Worth, TX.

Renovating distressed SFRs into duplexs (in zones that allow it). These areas are still vastly SFR. From what I'm seeing it looks like a duplex is generally valued lower than a SFR. Sometimes dramatically so. Though I can't get exact comps of the areas I'm looking at.

Is this something I should be worried about when getting to the Refinance "R" in the system?

The rental income is obviously better and with more risk mitigation on the duplex side. 

Does anyone have experience with this?

Thanks!