Here in the U.S., my friend's perfectly capable trail horse (who also has a variety of other training and has even done a bit of dressage) was around a $1000, a few years ago.
Camels have a reputation (I'm not sure to what extent it's deserved) of being somewhat more obstreperous; nonetheless, I have a hard time extrapolating to 50K, were camels in a like position to horses in the U.S. Not for a "decent" camel.
In current Saudi Arabia, sure, maybe. But current Saudi Arabia is not what's being talked about, as being "down the line".
P.S. Just don't hook my friend's horse up to a cart or sleigh or the like. She was never trained for that, and at this point, she's not having any of it. She also doesn't think much of jumping; smart horse, her joints will last longer.
I don't remember the exact wording, but I've heard and read that alpacas are fairly nice, while llamas will wait to knife you when your back is turned.
I have a friend down under (to the right of Oz) who has the former and has some knowledge of the latter. I seem to recall her confirming this, when I mentioned it.
