Antivenom for anything covered under either Thai polyvalent or south African polyvalent is 3-400 per vial last I heard. Ten vials would be a good starting point and shows that someone is making an effort. $4000 may seem like alot but many people spend more on other hobbies and this would still be cheaper than having to pay the price for the antivenom AND the plane or helicopter to fly it.
Even though the shelf life may only be 3-4 years, av has been shown to be effective past 20 years.
For US natives: Crofab is expensive, and wholesale antivipmyn (the more recent FDA approved av) is about 1000/vial wholesale. Still much cheaper than the hospital markup of $8-20000. Crofab starting dose is 6 vials and 2 vials every four hours until symptoms subside. Further, if you get bitten as a private keeper and use up the hospital's supply and then a kid gets bitten they may not be able to receive proper treatment. So you also potentially put someone else's life at risk by not covering your own butt.
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