Depending how long you're planning on keeping them, I would (in addition to all the really good suggestions above) add a long-acting antibiotic like Alamycin and maybe Metacam. The first for infections and minor illnesses, the second (combined with the first) as an anti-inflammatory for muscular problems, e.g. nasty sprains caused by running and slipping etc. Always handy.
Do you have anyone near you who breeds pigs? You may be able to come to an arrangement re. sharing meds - but remember that, even if you're getting products from someone other than your vet, you still need to keep a record of dates, doses, batch numbers, etc. in your medical records book.