It's going to be more difficult to find information on their care because of how few people keep non-native venomous. Without antivenin available, not a lot of people are crazy enough to do it. Unless things have changed in the last decade or so since I've been paying attention to hots, you can't get antivenon for non-US hots in the US unless you keep your own supply, and it's incredibly expensive to do so. Crofab is not cheap, but at least the local hospitals should have a supply so that you only need it if you get bitten, rather than needing to purchase it regularly (it expires relatively quickly). Keep in mind, this is the prices on one vial, and you could need anywhere from 4-12 vials:
https://www.wellrx.com/prescriptions/crofab/
https://crofab.com/Treating-With-Cro...administration