Need to learn how to make remedies, like activated charcoal, requires charcoal and calcium chlorate the deicer salt..
For antibiotics, large animal vet get large bottles of antibiotics as well as powdered, it’s cheap and legal farm stores have them on shelf
Mushroom extracts better than antibiotics. Look up Paul stamets.
Learn to stitch have the tools to do sutures including internal learn now on pork belly then turn into tasty bacon a two for one chore
For bleach get some calcium/ sodiun hypochorlite a 50 lb bag makes lifetime of bleach
1/2 tsp per gallon of bleach.
Calcium is also fire acellerant. Use demeralized water if possible. A bag can be cheaper than buying liquid bleach and does not lose potency over time.
There is so much more it just takes time to learn where and what to buy
You can cheap on a lot of med supplies but please don’t on tornequet make sure not a fake one use it practice one hand use. The fake one the velcro and windlasses break and don’t withstand pressure required to stop blood flow, beware on online shopping places. Like e and a alot of second rate stuff in this department