Canadian Military Common Law Partner Visa

Hello there I have been searching for hours now trying to find answers to my question. Hopfully sombody can help.
I am in the Canadian Military and will be going to work in the states on exchange i believe under a NATO Visa for 4 years. I have a my Common Law wife in Canada which I obviously want to come with me. She will be attending a canadian university through online correspondance for the duration of the stay. She will not be working any job or have any income. From what I have read she is not eligable for a corresponding Nato visa as we are not married yet.
What are my options for her to stay with me there. Our innitial plan was to just fly back to canada every 6 months or so for a week or so and then go back, but from what I am reading this is illegal and does not work.
So is there any way that she can get a visa or stay for the whole 4 years with out any reprecussion as we clearly are there on a temporary basis. Just a long 4 year temporary basis after which we will be moving back to canada.
I believe I may have just found my answer that she can keep renewing a B2 every 6 months.
Does the distance learning to the university in canada count for a tie to canada?
I also read something about a family B2 but really can not find much on this.
There is no waythat she would be able to work at like a grocery store if she wanted to correct?
Thanks Sorry if I am duplication previous posts

Cohabiting Partner B2 visa is your best option. It is a tourist status, meaning that she still must keep residential ties in canada, but the time limit of her "visit" will not be limited to six months, but rather the entire duration of your status. the initial status will be granted at the border when she enters, with proof of your status and some proof of her cohabiting with you in the past. Further renewals can be done each time she enters, or by mail, just be sure thathere status remains current.

The point about going back for a week being unacceptable applies to true tourists. This partner B2 is a special case.

She will not be allowed to work in US.

Well that is good news Thank you. For the keeping residential ties in Canada What are the best ways to do this. I am military we never owned a house she has like no bills. Is saying her family and such all lives in canada or that her principal residence would be her parents house enough.
As well for the cohabiting bit, the fact that we are common law should be enough for proof of that. other wise I dont have any. Again I am military and lived on the base all bills were in my name only.

Thanks