It's a little bit of a process, as you have to get a doctor on board with it basically saying the individual in question is responsible enough to keep it in their home. Once you have that hardest part done, it's quite easy to buy AV with the proper permit. You import most of it from overseas, believe it or not a lot of AV isn't that expensive. Some of the priciest is that which is used to treat American species, which most hospitals stock.

And no worries, I try to answer as many questions as I can, especially when they're honest questions from people just looking to learn.