Repairs on 1940s and1950s midwest properties are eating returns

[Alana Nevares]

We have few single families in University heights, Euclid and Garfield Heights. 

We should be making about 200 per door each month, however, repairs are compromising the returns. 

One of the properties was acquired 7 months ago and just had an 800 dollar bill on repairs (window, gutters, doors, and few other items). When do you know that it is time to let go from the property and that repairs are too many to hold on to it? Should I expect this with all 1950s properties? What can we do to minimize this.