Our boss would order new trucks with all street tires. When we got them we would take the new tires off and throw them on a pile and use them for steers. When steers got worn out we would cap them for drives several times over as I noted before. 2 to 3 times per casing IIRC. If we ran short of good casings then we would buy caps on casings from the tire store. Never laid a finger on a new drive as long as I worked there I think.
Again ultra short hauls for us, YMMV. I never had one come apart, it was always rock damage to tread or sidewall. No ring treads, always with a splice. Actually there might have been one casing failure on another guy that I heard about. Never a tread/cap failure.
As Doug said, you do what you got to do. I would do it again if I was in trucking. It worked for us.
Trucks averaged about 11 miles to the hour of engine run time. Would hit 65 mph maybe once a week.