Hi, I am a new investor and I am interested in a property in a low income neighborhood that has 8 standard windows with a few of them broken out. I am thinking of replacing all the windows with glass blocks, for security at a minimum. I think this might be a better choice that doing metal bars on the windows for the most basic reason it looks better. What do you all think?

You do the least expensive and the easiest to repair when the tenants or others do damage. Stay with inexpensive, easily replaced and repaired standard windows. Having to replace damaged glass blocks will be expensive and difficult to do. Appearance is secondary, if the homes in the area have metal bars you should also have metal bars.

In C/D class properties think cheep and easy.