IMO, it would be worth it to get the trimmer out who knows hoof mapping. If the farrier doesn't know about mapping then you won't achieve the needed results. I did pretty good maintaining hooves with a standard barefoot trim, but once I learned hoof mapping, (thanks again trinity), it literally shook my view on what I was doing. The results I see now are night and day. And it is also my opinion that you will achieve results quicker if you do this without shoes. The hoof is going to change shape right before your eyes......if you observe it long enough.
Also it is another opinion of mine that the trim needs to be maintained frequently.....at least weekly IMO, while the hoof is moving back into it's proper position to achieve quicker results.