Food really wouldnt be a problem for the snake in Hawaii..
It is easy according to many sites I searched, to bring a snake in, but they all say that you WILL be caught if trying to leave Hawaii with a snake.
Hawaii does have an amnesty program, for illegal animals, but would you really want to sentence the snake to death when you are ready to leave?
Even then, since Hawaii is under a federal quarentine on a lot of things, is a bad mark or possibly a dishonorable discharge, something your husband wants following him around all his life?
(Dishonorable discharge is the same as a convicted felon as in loss of many rights in the US.)
Wouldn't be worth it to me.. I love my honorable DD214.
Best bet is to give up the animals, either by selling or giving away and biding the time in Hawaii till it's done.