I vote you stay where you are and be thankful for a good boss & his family. I worked in hospitals for years and last year I was in a Nursing Home when I needed Rehab, after having both knees replaced. I hated the Nursing Home and you're right about the smell. Being around sick folks on an ongoing basis can become depressing, so think long & hard about leaving a good work environment.
How about making lap quilts to donate to residents of the Nursing Home. There are a lot of ways to Volunteer without going to work at one. Good luck.