Is this a good deal?

[Sanjeev Advani]

I am looking at an investment property in Bakersfield, CA (Kern County) that is a B neighborhood.  The current owner has an offer for $100K, but the comps are a solid $170K-$175K.  The property needs about $30K in rehab.  Holding costs about $750/month for 4 months. 

Based on my numbers I'll end up around 18% ROI for about 6 months worth of work.

I was also thinking about BRRR, and renting it for $900-$1000/month and refi which would leave me with about $15K of my own money in the property and pay expenses monthly so I could break even.

Thoughts?