Purchasing vacant property family home

[Nyashia LaFate]

Long time lurker here, finally built up the courage to post. Lol

I really need help with configuring a good deal if it makes sense. 

I want to Purchase my grandmother's home as a rental investment but I'm not sure if its a good deal. The quick details:

Ok Decent neighborhood average rent $1200 19802

Grandmother has a 2ND mortgage $38k she just wants out as she is retiring soon.

House is currently vacant(mold) and is listed as so with the city. If I purchase, i would recieve a 10yr 80% tax abatement. 

Zillow zestimate $103k

Back taxes/water bill $7200 SHERIFF SALE is imminent

Mold issues,new roof needed(est 60k repairs)

How can i work out a deal that makes sense? I have great credit and my husband and i would be First time home buyers. We don't have much liquidity.

Thank you all in advance!!!