I also am in this position right now with offers and wondering about a non-academic spousal hire. Curious to hear from others…don't want to create bad blood by requesting something that would be nearly impossible for a department/school within a university to handle but also need to be realistic about the family situation.
Congratulations! I think that the bar prep course would be worth a shot for a top SLAC, as these sometimes have money. It's kind of in the same category as moving expenses. I wouldn't expect much, but you might as well ask. If you had said "SLAC" and not "top SLAC" I might have said don't bother, though.
ask for what you need to be successful in the job they are hiring for. they will let you know what they are able to do - financially and legally.
they might or might not be able to earmark funds for a spouse's career needs. some places will help with a nonacademic partner's job search - resume review, researching local matches, possibly setting up informational interviews. they might kick in extra funds on something else like moving expenses.