(Rant start) From a monetary standpoint AND quality of life standpoint, going to law school purely on loans (in most cases), is a bad idea.
I certainly would not have gone to law school if I hadn't planned on going into a type of law that is very similar to engineering (pays better and has slightly less grueling hours as such). I would have stuck with engineering for sure.
There are very few legal scholarships (and those are mostly for minorities), 99% of law students get most of their aid from loans, work, and/or get a merit scholarship from their school (from most common to least).
Law schools on average cost $35K/year, and with living expenses+books, add up to about $50k/year. Sure, there are a FEW states with reasonably priced state schools in the $10-20K/year range, but they are a tiny handful which require state residency and are in small markets mostly. This is not the case in most states. On average law students come out grossing on average $50k a year. There IS greater income potential later than most jobs with similar pay, but it is a lot later, 8-15 years later. There are caveats, those who go into corporate law (the top 10% only may choose this), or patent law (engineers/PhDs only) can they have a 6 figure salary soon after law school. Hiring rates are a roller coster, some years 90% of firms are hiring, others (like 2008), literally only 10% of firms were hiring.
Quality of life wise, law sucks, it is one of the worst quality of life fields, nearly on par with doctors in some cases. The work required is 50-100 hours/week (my uncle works 90/hours a week and hes 50), depending on the type of job. Having a family is brutal.
That all said (rant over), if his LSATS are in the mid 150s or higher, he probably can get a decent merit scholarship somewhere, so the cost isn't so brutal. Otherwise, the only choice is to max out subsidized loans, max out unsubsidized loans, max out grad plus loans the first year, and try and get a job (based on, bare minimum, top 25% grades), the second and third year. I did that and reduced the cost from $130k to $55k (because I had good grades my first year). I worked all through my engineering undergrad and had no debt from that, but many law students (like my former law school roommate), have substantial debt even from undergrad (he's sitting on $170k of debt and is VERY nervous about it).