I was directly responsible for negotiating prices for ongoing engagements just like this (even more long term). For an engagement like this, we'd probably agree to $40 per hour. At 25 hours per week for 12 weeks, that's a $12k for a single interpreter for that engagement.

The interpreter we'd send would be qualified, but may not be licensed (which is fine and legal under the ADA definition).

You mentioned "reasonable accommodation" earlier, and I think what you're trying to argue is "undue hardship." So, you're the one that gave me numbers...

If a bootcamp charges $15k per student, and they graduate 60 people per year (you mentioned in another comment), that brings a revenue to $900k. Even if the bootcamp needed to pay $30k for one student to have a contracted interpreter, that's only 3% of their yearly revenue. I'm not a tax law expert, but I'd imagine you can also write off the cost of interpreting services as a business expense. It'd be pretty difficult to look at those numbers and see an undue hardship on their business.