Depends on where you are and what type of insurance you have, if any. You usually have to be an immediate risk to yourself or others. Average stay is five to seven days here in NJ, US. But in the US it ultimately depends on insurance, as crappy as that is. If your insurance says they're not paying, you're out. Last time I was inpatient someone was put out even though she said she had a gun and was going to kill herself as soon as she got home.

Inpatient is only for short term stabilization. It won't necessarily help you find a permanent solution, especially for BP. It can stabilize a crisis if you are in danger but you will still have to do a lot of work after that. I wouldn't recommend it unless you are in danger.

There are some - and only some - residential treatment centers akin to rehabs for mental health where you can stay for a couple of months or so. Destination hope in Florida does that. But again...if insurance doesn't want to pay, you're SOL.