this is by definition risk free. a free lottery ticket is risk free in the sense that you cannot lose anything - it doesn't mean you will win. it means if you lose, it doesn't matter because you are playing with house money.
OP has $0 at risk in law school, 3 years of time, and living costs. Living costs will exist whether OP is in law school or not, so this is risk free. OPs only other option with the 3 years of time is immediate deployment, which OP does not want to do, so this is a guaranteed net benefit. Law school is $0, so 0 risk there.
My bad guys, yall were right. This is not only risk free but a guaranteed net benefit.
because OP is guaranteed to be in PLSF job after graduating because OP will either deploy or JAG it means the debt load should be analyzed knowing there is a 10% income limit and 10 year time limit of debt repayment. This greatly minimizes any debt concerns. Assuming a $55k JAG salary (I have no idea what they are) you are looking at $4k a year in debt repayment. Time value of money makes it lower, but the max value of that debt is $40k. So, Hastings sticker is really $40k if OP gets his dream job.
If OP misses his dream job, he's in the army and probably not making any debt repayments for a couple years with a salary around $20k and then $1k a year tops. So that's like $8k of Hastings sticker, without even factoring time value of money.
The present value of Hastings sticker isn't really that bad now is it?