Arabs think a little different than other breeds.
They will not put up with "the beatings will continue until the morale improves". Arabs can't be forced into anything; they have to think it's their idea, whatever "it" is
That includes loading in a trailer and it sounds as if they may not be versed on being hauled anywhere
Meaning find a fair-minded and ethical trainer in your area that has worked with Arabs for several years.
My Arab is 27. I rescued him 20+ years ago. To this day, I have to be in slow motion when I put a halter on him, mess with his ear, just anything with his head. He used to go absolutely nuts if I raised my hand too fast, these days he just gets those "Betty Davis Eyes"
They are wonderfully loyal horses, when treated fairly, and will give their life for their Person.
If it's come down to either you or the slaughter auction, they are basically healthy, you have ample room for them to be outside and play, have shelter, then take a chance on them.
If they are treated fairly, I agree with the previous poster, that anything they learned 10 years ago will come back quickly BUT that includes the bad too