They can go up to a year or longer. Many of them require the resident to get a job and do not allow the family to pay for more than the first 2 or 3 weeks. It is about them being self supporting through their own contributions.
As to being a good idea or not .......................... everyone I have seen go through a Sober Living Facility and stick it out has come out much better able to cope with living sober and a much more active recovery program working for them.
J M H O
Love and hugs,