Movement is key for healthy barefoot feet, as well as for healthy brains and bodies.
Achieve movement in as many different ways as possible; turnout, ridden work, ground work, in hand work, even the use of a horse walker; all these can all help you get to an adequate mileage.
If hoof protection is required, then by all means use it. By hoof protection I mean hoof boots and pads. Hoof Armour looks interesting, as do some of the clip on plastic shoes, but I do not class steel horse shoes as protection, because they impair the natural physiological function of the hoof.
And please remember to have fun with your horses. The journey of a thousand miles is a long way, and a long time; best to have some fun along the way.