I figure $40 per month for feed, wormers, etc. Your saddle and panniers will run you about $200.00. You can get a saddle kit from Northwest Pack Goat Supply for $65.00. A dairy wether is about $75.00. One from a pack goat breeder can be as much as $250.00. Mine are purebred Alpines and LaMancha/Alpine experimentals, but, have proven pack goats in their lines. Price is negotiable with me and I'm willing to do some trade.
Training is just a matter of get out and doing it. From the very beginning I start feeding their bottle in one part of the pen and then walk away and feed them more somewhere else. Just like a mother goat. I start taking mine to the beach and out on trails at 3 weeks old when I start their first cocci prevention. We don't go fast or far but, it gets them used to you being their safety and comfort. At that age your bottle baby will pretty much follow you anywhere. I start introducing them to peanuts at that time too. They are the treat of choice here and are easy to carry in a pocket. They also come in handy for giving pills. I partially crack one, dump the seed out and stick the pill in. They never even notice it's there. No stress.
As they grow just start crossing water, bridges, anything you can think of. Bicycles, they are scary, introduce them to bicycles we always see a lot of mountain bikers on the multi-use trails. They warn you they're coming, I've never met a rude mountain biker. Another thing, something about a goat wearing a saddle and panniers will panic some horses. I always just give them the trail and hold my goats. Some will stop to chat and some will huff on by. Some horse riders are very, hmm, interesting.
Alright, I got some stuff to do tonight be back in a couple hours...