The only downfall to inpatient (that I saw with my A) is that it took him away from everything. He did 2 months. During that time they did everything for him (except his laundry). He didn't have a care in the world. Which I suppose is the point...to ONLY focus on their addiction. However, when he got out he wasn't able to cope or apply the tools he learned in rehab. He started drinking 6mo later. However, if your A really wants to quit, and contiunues with a good aftercare program I think it would be best. Mine has to get sober and then learn how to cope with life with the support. (I think a sober living place for 6mo or a year would benefit him most).
Anyways, my only question about wanting to do the outpatient for your A....is it so he can say he's in rehab and then drink in the evenings?? Don't know your situation but mine is a secret drinker (until he gets too drunk that is). Just saying...