There are low-cost law schools in the US. What you'll find, however, is that big-name law firms, Supreme Court clerkships, and other prestigious (and well-compensated) opportunities tend not to hire from them.
If you're looking to go into private practice or are targeting a less-ambitious role, or get lucky with a roll of the dice / spin of the wheel, they might work out fine.
Searching for "low cost law school" will come up with various listings. The top options on this list appear to run about 1/20th the cost of Harvard (I'm presuming that the tuition figure is for a full three-year programme, not on a per-year basis, the text makes this ... less than clear).
<https://affordableschools.net/the-10-most-affordable-law-sch...>