Off-campus housing varies a lot.
My son spent 2 years living in one of the ‘older’ resort style complexes. It was a fully furnished 4BR unit with individual leases. He was paying about $550/month + $40 for utilities + utility overages which they had almost every month, so it wound up being a bit over $600/month. He never used any of the extra amenities (the clubhouse with the computers and pool tables, the gym, or the swimming pool) the complex offered.
After 2 years, he opted to move because he wanted fewer roommates. He’s now in a 2BR townhouse, paying around $450/month + about $80 for utils. It wasn’t furnished, so we had to buy all the furnishings, but bought most used or bought unassembled online so kept it ‘affordable’. It is not an individual lease, but his roommate is a student he attended high school with and we know his family if there is ever an issue with payment. It’s less than 2 miles from campus and although my son has a car, he usually rides his bike because he finds it quicker.
Both were less expensive for a 12 month lease than the cost of the suite style dorm that we paid for his first year and it’s worked out nicely since he’s spent 2 summers in Tuscaloosa working (one summer as a co-op student and again for the same co-op employer after his co-op ended).
There are some older/smaller units that can be found for a bit less and some of the newer units can be $1000+/month especially the 1 and 2 bedroom units because there are fewer of those available.
It really just depends on what you’re looking for in terms of location, amenities, and budget.