I'm in a BSN program and just went through all this recently.
You will need to somehow show you have immunity against Rubella because of pregnant women you will be around. They don't care
how you have immunity, just that you have it because it's a liability for them is there way of thinking.
I got a titer for chickenpox done for $15.
I was able to find my old MMR records from childhood but also got titers done and I still showed vaccine induced immunity. If you do have to get the MMR for some reason, your health dept should be able to give that one for free. The titers here for MMR was only $15 as well, I would go with that first if you can't find your vax records. I'm not sure about the waivers on that for hospitals because of the rubella part.
HepB you should be able to decline because that is for your protection, not the patients. So it is a bit different--make sure you research that one. My school handed out waiver forms and I think I was the only person who waived it...lol But I was thankful it was so easy to do. And really your going to be working around a LOT more HepC patients than HepB.
Our program didn't require anything else except 2 step PPD test which is fine with me.
It's hard with nursing school. The school really doesnt' care, it's all the hospitals that care and your going to be rotating through a LOT of different hospitals and you must comply with all of them--public and private.
I LOVE nursing school though, it is a lot of fun! Even though I don't always agree with every single thing, I'm learning and seeing A LOT. It's good experience either way. I have to have my BSN because I want to get either my NP or PA masters. We have some seriously awesome CNMs here where I work too, they are just awesome---the OB/GYNs all can't stand them so that tells me the CNMs are doing what they do best

Good luck!