One of the aspects I considered in picking my majors is the job demand and job security. There is a fairly high demand for nurses and depending on the level of your degree (i.e. community college vs Master's in nursing), you'll have differing opportunities. I don't do much at all in photography so I assume it's similar to music in that only the best make a lot of money, while others make either low income or medium income. I have no idea about sign language interpreters, however, it seems be a good facet for certain jobs, such as special education for teaching deaf or blind children, working in audiology or otology, etc... . I suppose it can be used for other areas just I cant think of any others as I know very little on the subject.

In my view, I would say nursing has the greatest chance for success and learning sign language can be a useful add on, with photography as a hobby to pursue outside of work. I did some research while in my undergrad involving audiology and otology (hearing, hearing disorders and hearing devices). Since many clients or patients have some degree of hearing loss, it would be useful to know some sign-language, although at least in Canada, there are very few places for becoming certified and earning a Master's in audiology. Otology is a field of medicine, so you'd have to get into medical school or perhaps as a specialized type of nursing.