I think I am going to stop using the word 'transition' when discussing how to transform a sickly shod foot to a high performance barefooter; I've come to the conclusion that it creates false impressions and expectations in a lot of people's minds.
Almost as though the process is no more challenging than moving from train station to airport lounge, when actually there is usually the need for a tremendous amount of hoof structure development which takes a lot of time and application. Often many months of daily grind.
Which leads me to success factors.
What really counts? Time and consistent delivery of the things a healthy hoof needs; decent diet and appropriate exercise. Not money or lots of facilities. Just quiet determination and the ability to read your horse and act accordingly.
The very best hooves on my books are attached to horses that frequently live out 24/7, often in less than ideal environments, one particularly so, but they are fed properly and work their butts off.
Note: they work their butts off - a hoof needs to work, one that doesn't will lose function and performance even if it is outwardly 'pretty' and tough.
Those on full livery seem to do the least well. And it's not because the owner lacks dedication or makes no effort. But 'things' have a way of happening that throw a proper spanner in the works. From unhelpful turnout situations/timings; to equally unhelpful feeding practices and time/cost pressures on livery staff.
More than one horse on my books has had it's health transformed by moving from human 'ideal' livery to something far less luxurious. Not sure the same can be said for their carers though.......... (only kidding - the carers seem to cope just fine!)
I personally found the same with previous horses. Moved them from very nice stables etc etc to a muddy field with a track, no rugs, no electricity or school. They did just great, so did my bank balance.
And oddly I ended up doing much more riding - with no yard to sweep or stables to muck out I had more time. And the feet working so much harder were so much fitter - and so was I :-)