"I'm trying to get an idea what the cost would be to complete a bronze program. Average cost per lesson or per level? Any measurable unit so that I can get an idea of the cost involved over a period of time for the program. "
With the exception of wedding dance performance programs, ballroom just isn't usually offered as something one does for a while, accomplishes, and then has no more expense.
That said, many people have done that - they learned a bit and they still go to socials but no longer take lessons - but it's not how dancing is offered, for two reasons. First, those who do best in dancing find they can't get enough of it - they aren't looking to finish a program, but to continue improving. Most teachers themselves, along with the longtime students who provide the bulk of their income, come from that category. Second, for a dance business, recruiting and retention are the two biggest challenges. Students who will study for a few months and then leave are students who have to constantly be replaced, so a business is going to try to organize itself to promote lasting interest.
You don't have to personally make dancing a permanent expense, but beyond the first few weeks of developing comfort, the value is in the journey not the destination. Dancing will cost (average sessions cost) * (number of sessions per week) for however long you choose to participate in a student role.
Social dancing as a no-longer-student will cost (average social admission) however often you enjoy attending.
To view it another way, it can sometimes makes sense to temporarily "double up" on your lessons beyond what is a sustainable budget to accomplish some particular near term goal, but as general advice, if interested in ballroom, seek a form of training that you can afford to continue not just for a few months, but indefinitely.