I've worked for two different hospices and currently have a job where I have daily contact with several hospices. BEWARE any hospice job that is on call and salary. What they are telling your wife about not getting called out that often is nice, but the reality is that if there is an admission (2-6 hours, depending on the patient and situation) that gets pushed to after hours or any other "leftover" work from the day shift, e.g. scheduled visits that the day shift case managers couldn't get to during their shifts, it will probably get dumped onto her and she will have nights where she is swamped with work, even if she doesn't get called out for an emergent need. Hospices don't like to pay people to sit around and twiddle their thumbs, believe me, they will likely find her plenty to do aside from the visits that she has to do. The whole on call thing sounds good in theory but unfortunately, it really is too good to be true in many cases.
I accepted a 7 days on/7 days off on call job with a hospice a few years ago and was told that during my off week I wouldn't have to do anything and during my on week I would have days off and be on call all night, similar to what your wife is considering. The reality after I had gotten through most of my orientation was that I was expected to be available during the days on my off week because I didn't have to go out at night (so no off week at all, go figure!), and that I would be available during the days on my on week because the supervisor decided that there weren't enough visits on average to warrant my salary. So on my on weeks, I was literally expected to be available 24/7 for seven days in a row. No, thanks, I quit as soon as all of this was presented to me.
Tell your wife to be very, very careful and ask a LOT of questions about job expectations. Will she be expected to do anything above and beyond the emergent visits? Will she have to do admissions, clean up after a slow case manager who consistently doesn't get her work done during the day? If possible, she needs to get it in writing. That was my mistake.
Best to both of you!