I have experienced many blow outs as a kid with no money and junk yard tires. $1 each.
A blow out is not something I would want pulling my trailer. Twice as a kid I found myself upside down and another time left the road without my help at high speed and went right between two utility poles that took off both mirrors. I only tell you this to illustrate the fact that God takes care of fools.
The fool grew up and now I buy the best available tires, way before I hit the wear bars. Money is no object when life and death situations can be avoided.