Most of the good barefoot trimmers I have encountered do not even have the equipment to put shoes on, as they only do barefoot trims. And the good barefoot trimmers also would want to look at the feet before they said it would be possible to transition from shoes to bare feet. Sadly, there will always be people who will claim to have skills they don’t actually have just to get more business. Ask other horse owners in your area who have successfully transitioned to barefoot or whose horses have always gone barefoot, which farrier they use. The trimming is different for barefoot and shoes, so while the farrier you try may also do shoes, ask where they got certified for barefoot trims, and if you have any questions, contact that organization and make sure the farrier has been trained in barefoot trims.