To be honest, "respectable law school" can mean a lot of things.
You say you want to do corporate work or go in house. That means a large law firm to start. Only the top 14 (and many would argue only the top 6 or even 3) schools in the country give you enough certainty of getting a large firm job that you should bet 200k on the prospect. To be sure, there are other ways of handling that debt load (income based repayal with public interest jobs for example), but there really are few ways of getting into corporate law outside of the large law firms.
The truth is that a JD is cheaper than a CPA. It really is, you just have to get a good enough GPA or LSAT to go for friggin' free.
Depends on the state, but in many states you can get your CPA with just your undergrad accounting courses plus accounting work experience. So you actually get paid while getting your CPA. Even if you get a full ride to law school, you still have to pay for your living expenses. And those "full rides" often come with onerous conditions that may mean that most people awarded scholarships lose them before graduation.