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I would say Yes, the industrial growers have a better strain than the typical hatchery CornX.  We had NO leg problems, but they were sensitive to temperature changes.  
One family got attached to the birds, and did not process until they were near turkey sized (several more months).  It was reported they were still tender and delicious.
We also raise DP breeds.  We eat our surplus DP roos.  I have to admit to eat I prefer the CornX, because I like breast meat, and the DP Roos are more expensive to get there.  But the DP roos are more interesting to raise with a lot more personality and behaviors.  The CornX just eat and squat.
So I would continue to raise and eat your hatched roos, but do not expect to save money over bought chicken unless you can find a free source of food for them.  All that labor, medical and such that you talked about saving by working to raise your own birds, you are instead having to spend on the folks producing your bagged feed.  That is the expensive bit you have to replace.