Could you live, have you lived with a much older roommate?

As anyone who has lived with roommates knows, good ones are hard to find. My requirements are small, no smokers, no drugs, prefer a female roomie, must like cats (I have two), no pets of their own. Oh and pays their rent on time. So far, I have had some male responses. NO thanks. Some people with pets. No thanks again. One with a BOA CONSTRICTOR.. EEEKKKKK!!
This last one is a lady. Love cats. Is quiet. A non smoker. A non druggie. The only caveat is, based on her facebook she is at least 60 something. Maybe 70 something. She is a retired nurse on disability. I guess my question is, is age alone a no no? Particularly one that is much older? I worry that if my situation changes and I need her gone that it will be harder to get her gone. Most younger people are transient so its kind of expected that they move on eventually. I also realize that one day, much sooner that I'd like I';m afraid, I will be that age needing a place to stay....
