@Claire H. Do you know if the foundation has ever been replaced, and if so when? I know that will be one of the biggest repair costs, and are quite common in Fort Worth and Texas in general. I'd rather go with a wholesaler or local pre-foreclosure before committing to something on zillow that seems like a grab for an eager newbie investor... In that regards, it could be an easy way to conventionally house hack. It may be worth an offer below asking, and then pending the inspection you could knock major money off, especially if it's a foundation issue.
On a similar note, I would look at the current owner, how long they owned, what they bought it for and their ROI, etc... Perhaps they simply ran out of money to complete the rehab? If they are motivated, then there is always wiggle room to discuss it with them/their agent. You can look most of that up, since it is public records!
I'd ask an agent or someone in the area what they're paying before using the rent-o-meter also... determining your cash flow in a skeptical neighborhood is crucial to making the buy and hold worth it IMO.
Keep us updated!