This is what is such a problem.
The neighborhoods are in bad shape. You have to put in a pretty good amount of money to make a difference, fixing roads, or just clearing debris, isnt enough. You are talking new or completely renovated buildings. Even if you do "affordable" you are raising the costs in these areas. The people living there cant afford even moderate price increases. You somehow have to invest 10s or 100s of millions, but not effect the cost of living. It's a catch 22. Even if rent stays the same the appraisals go up, and people coming in end up paying more than the old rates which "forces" people out.
So somehow you have to make changes, but not effect any change. Spend millions but expect no cost delta. It makes no sense. You have to find people willing to take losses in order to fix things.