In the right places, I think it's fine. If we signed that left back for example, Cirkin is going to be cover during AFCON, then you have Alese, Huggins and Hume as emergency cover. I think you survive 6 games if he's a player for the next 3 or 4 years.
If we signed 2 of Singo, Sagnan, and Kipre (all linked) we'd potentially have our current back 4 for those 8 games.
That can't happen.