Australia versus New Zealand

I'm pretty sure you've already had a consultation with more then just one lawyer. I empathize your situation and I know it's hard for you. I think Dream Act or immigration reform will pass. Hopefully sooner than later. The big problem is that you won't be able to obtain a license without a SSN. I don't know, maybe some states don't require SSN for obtaining a license. Then you need to take NCLEX there. It's important to get your license here in the States. Also, if you consider moving to another country as a backup plan, make sure you have your BSN first.

You can't get a license in California, but maybe in other states you can. You have to find out, and then you have to take NCLEX and apply for initial licensure in that state. Then you have to get BSN in that state too. Getting experience in not as important as getting a license and BSN. Just for your information, many Filipinos manage to get the US license without leaving Phillipines and without a SSN.

I think you can get licensed in Oregon without a SSN
http://www.oregon.gov/OSBN/SSN_info.shtml

Seach on google about other states.

No it's not going to be better to get your BSN in Canada. First of all, you are you going to get there? Second, you need a license anyway. So I would suggest to do a research in which state you can be licensed, and also what's the admission criteria and cost for BSN program there. Obtaining BSN in the States should be your priority at this moment. Experience is only secondary.
I would like to emphasize that you need to take initial licensure exam in the state where you plan to get your license.

I think you are confusing yourself with your research. The RN to BScN transition in Canada is for experienced RN diploma holders to gain the BScN degree. The degree is a requirement for entry into nursing practice in Canada. The existing, experienced diploma nurses are upgrading in order to become Managers and work in Public Health. It is a career advancement step for these nurses.

No it's not going to be better to get your BSN in Canada. First of all, you are you going to get there? Second, you need a license anyway. So I would suggest to do a research in which state you can be licensed, and also what's the admission criteria and cost for BSN program there. Obtaining BSN in the States should be your priority at this moment. Experience is only secondary.
I would like to emphasize that you need to take initial licensure exam in the state where you plan to get your license.