Personally, in every single interview I have ever had, I have asked about pay. There have been times that I have walked away from an interview knowing that I would get a call but that I would not take the job, simply because the pay wasn't high enough. Of course, those were in my welding days. I am currently at my lowest paying job since high school.
As far as mentioning the time to be requested off, I wouldn't bring it up. Know that things are set in stone before you ask for two weeks off. You're not likely to get it, but you can still request it. Also, if they don't give you the time off, do NOT call in during that period for ANY reason. I have seen people get fired over their first call-in when it was during a time that they had requested off. I have fired people for it. I don't know how things work in healthcare, but that has always signaled a lack of commitment to me.
Now, things to look for. Cleanliness!!! This is the first thing I looked for in a facility. I only applied at half of the LTCs in my town because of cleanliness. Also, when you walk in, take a deep breath. If you smell feces or urine, walk right back out. If you smell air freshener, be concerned. The facility I work at has a scent to it, I'm not going to lie, but it's not a smell of soiled briefs/linens, must, or anything like that. It's the smell of old people. Ask anyone here, old people give off an odor. It's not an unpleasant scent or anything, but once you smell it, you will know it.
Congratulations on looking for a job. I got one, so I know there are jobs available. I haven't had a recordable job in three years and I got a call within a week and a half of applying.