I had to smile a soon as I saw the word "painful"
I don't have an answer either.
I am thankful that I learned to trim from my granddad when I was a kid; I've trimmed my horses off and on thru my life when money was tight.
Sadly, now that I am old enough to be fully retired I am trimming all four of my horses full time
One has a less-than-Grade 1 club hoof, therefore a prescription.
Two have metabolic issues with the 24 yr old wanting to have wall separation if I don't stay on top of him every 3 - 4 weeks.
The fourth one (25+ yrs) is sorta normal but not really because of arthritis build-up in a back injury from when I rescued him 18+ years ago.
So why, in my old age, am I having to trim? It is because the 30-something fella who was great the first three years could not keep his personal woman issues from between the rasp and my horses hooves
When I saw all four of my horses hooves peel and chip back only three weeks into the trim, I was livid. Livid because my 24 yr old with EMS has never once had cracked, chipped, peeled hooves in the 21 years we've been buds.
I later found out he did the same thing to the horses of a lady I'm acquainted with on my local forum. Annnd two of her horses abscessed. He was filling in while her regular trimmer had shoulder surgery; she tried to tell him how to trim them and he wouldn't listen.
He later blamed her hoof issues on diet ---- just like he did with me
Even though I should not be trimming 16 hooves for health reasons, I am at least one of the lucky ones that knows how.
It might be worth the OP and previous poster's time to at least learn to rasp? If you rasp every 3 - 4 weeks, you pretty much wouldn't need knippers, except to maybe cut the heels down a bit.
I started trimming in that short time frame because my hands have arthritis in them and I don't trust myself to take a good cut anymore. I have found that rasping my two metabolic horses' hooves that frequently, actually pays off a lot more for them than when the Trimmer-with-the-woman-problems came every five weeks
The other option is to maybe get on-line and look up the farrier and/or Trimmer directories to see who might be near you or willing to drive to you.
If you Google "Directory of barefoot trimmers" or "Directory of Farriers", you will get several hits that may help