Everyone is different.
We did 7 years of marriage counseling. Most of that was in the throes of alcoholism and through either student health or my employer's EAP.
When we moved, I found a therapist I really liked who specialized in addictions, and set it up as "marriage counseling," which she saw right through, and announced she'd be focusing on him. Which is exactly what I wanted. I saw "our" therapist on my own a couple of times as I was making the decision that my line had been crossed and I wasn't going back. It was mostly nice to have a sounding board who wasn't my mother agree that I wasn't the crazy one.
If you're getting enough out of AlAnon, maybe you don't need it. And if you can't afford it, well, that's a huge consideration.
Just my 2c