In my own mind, there are two distinct issues involved in rearing queens. First, is the genetic component, and second, the general development and health of an individual queen. These two issues get blurred in most discourse about backyard Queen Rearing.
You can provide an environment to produce the best nourished, best developed Queen on the planet...But if she does not have favorable genetics you won't be happy in the long run.
I don't expect to be the lottery winner who finds that 'perfect' feral queen, so I buy the best queens I can and treat each hive according to its performance. (Don't misunderstand me here, I keep feral catches every year and monitor how they do). I want/need a fresh infusion of genes every couple years. Everything I do for the bees is to provide the best environment I can for their success.
When my bees make another queen, I want them to have the resources and genes to produce a well nourished, well developed, disease resistant queen. That is what you can do that a huge queen breeder may not do. But, the huge breeder (not the producer) may have the superior genetics. That, in my view, is a good plan for long term success in your backyard beekeeping.
Get some good genetics in your apiary and produce your own well nourished, well developed, disease resistant queens. It works for me...Your results may vary.