There are several Arkansas breeders on dairygoatinfo.com talk wiith Kaye White see what vet she uses.
Everything you are needing can be found in the jeffers catalog...call 1-8000jeffers and ask them to send their livesock, pet and equine catalogs. or go to jefferspet.com and click on livestock. Lots of stuff you are ordering is fluff, with 3 infant kids you should be concentrating on kid things.
Someone is going to disbud them right? If not find one of the gal to take them to and get them done. Is the male going to be for breeding, if not castrate him at the same time. So get some Furox to continue to spray the hornbuds. They will need their vaccinations for CD&T at 6, 9 and 12 weeks, so 3cc syringes and needles also. Valbazen 1cc per 10 pounds orally (a syringe to do this with) starting at 3 weeks old. Bottle feeding equipment, ask the breeder what she is going to start them on, if she does not use lambar nipples send her 3. Then by 2 weeks they will be used to them and you can move the 3 onto a bucket feeder, cheap and soo simple. Use Grocery store milk no matter what, dont' let anyone talk you into milk replacer. Something to put the hay in off the ground they will start by eating only the tender leaves, grain and minerals come much much later, keep this in the house so it does not get wet from humidity, and bring out to the barn only what you are trying to get them to eat. Put off buying your minerals until you talk to someone in your area and buy what they use. Jeffers carries the shear majic hoof shears, and goat weigh tapes, get both.
You will want to keep these little guys dry, notice I did not say warm. They come in fur coats, so if their area is soo warm that you can take your coat off it is too enclosed for them. Keep them out of the rain and blowing wind, but not out of the cool crisp air and any sunshine you have
Meds can be ordered as you learn more about what you want to use them for, a kid isn't going to get into anything that they would need pennicillin.
At 3 weeks and every 21 days after that for 5 days you need to use a sulfa on them, or you can add this to their bottles each day, some find that eaiser, with Deccox M from jeffers. This will handle cocci.
You won't need Bo-se for months, no reason to get it now, plus you have to get a vet script anyway and you have to meet a vet
Probiotics, the dispersable powder in Jeffers is great to add to bottles. Masking diarrhea with pepto and the like...use prevention, only feed grocery store milk and you won't have one day of diarrhea.
Goat nutridrench and the like is wasteful, it is good for nothing

If you want to use vitamins for your kids, than use a horse tonic with iron and vitamins in it, just don't put so much into the bottles that they refuse to take them. You will never be giving your kids electrolytes or pedilite stuff, ever. If they are dehydrated you will use lacated ringers subq, setups can be purchased at pipevet.com or from your vet you will have.
If you don't use molassas you won't have to use sodium bicarb
Make sure you put out very tiny water buckets when the kids are about 3 weeks old, although some kids don't drink very much water until after weaning. Make sure if they jump into the bucket that it will tip over easily.
DE I am sure is fine for spreading in the bedding to keep fly larve down, it's just so irritating to lung tissue, so I wouldn't use it in my kid pen anyway.
The vet thermometers in jeffers are great because they come on a string and in a pencile case, so they don't get lost in bedding.
You will add to your stock of supplies as you go, have fun! Vicki