How to get mandated repairs done in short timeline?

I'm currently renting an apartment but looking at the possibility of buying a foreclosed house from the city. (City foreclosed previous owners due to unpaid property taxes and now is trying to unload them if they can, otherwise they get demo'ed.)

It has repairs mandated by the city to bring it up to code, which must be done in 180 days of closing. I've owned houses in the past and know that it can be hard to get contractors to even bid, depending on the size of the repair. So I'm curious, is it likely that the city has a list of contractors willing to bid and maybe do the work on houses like this (they have a list, only one of which I'm interested in) within the city's timeline? Especially since the mandated repairs are to bring it up to city codes and require permits (thus inspections).

Edit for clarity: what I'm wondering about is the timeline for the repairs. 180 days seems very short.