I always get the impression that many farriers are divas. Look at them wrong and they are just "too good" to trim your horses.
Really, I can understand farriers avoiding problem horses. Shoeing horses is hard enough work and dangerous enough even with nice horses. But barring problem horses, I do think many farriers lack business skills. Maybe the occupation attracts more than it's fair share of drifters with poor people skills or something.
I have been trimming my own horses for probably 15 years now. I started out shoeing them, had some health problems, would have loved to have paid a good farrier, could not find any I thought did a decent job in my rural area, and then just decided to try barefoot and haven't looked back. It works for me because I can do all the trimming myself, whenever needed, and just use boots if I ride with friends in rocky areas.
But I really feel for all of you looking for good farriers because I would have liked to have had that option at one point and couldn't find a good one either. Luckily my health has been holding up for me to do my own trimming.