i do httm
you'll need at least 2 of pretty much everything, ideally more so you don't feel pressured to clean the stuff all of the time. tanks, heaters, airstones/powerheads and that's about it. ideally some pvc pipes for hiding
i used to use seachem prime to neutralize ammonia, but it was brought to my attention it maybe doesn't do that, so now i just keep 4+ pieces of biomedia or whatever in my dt. then i just use one for each tank transfer
medications for most fish just require a bottle of (ideally new) 3% hydrogen peroxide and i use general cure to deworm. so for the most part the fish are not hanging out in meds. caveat being you'll want to do formalin baths and dose formalin if you want to do uronema prone species, especially chromis and anthias