If the snake can eat an drink on it's own the care is the same as any other BP. If not, well it never should have been sold.
As for housing, I have pets so they are displayed. Tubs hide snakes so it's hard to enjoy them IMO. Tubs an racks are great for breeders in the business an large collections.
For a snakes with bad wobble I'd use paper bedding an overhead radiant heat. A shallow water bowl if it has trouble.
Have you fed it? That would be the important part. If it can't eat on it's own for me the correct thing to do is put it down. You can't save them all. Save the ones you can.
Good luck!