Sorry but I doubt you'd get them over in 5yrs unless it was on a Prospective Marriage Visa.
DIAC demands a 12 month relationship requirement.
Australian Immigration Fact Sheet 35. One-Year Relationship Requirement
If you are from a western country that includes living together unless you are not apart on a permanent basis. That would usually be visa issues ie citizens of different countries and can not get a visa to live together or you are placed away by your work ie you are in the forces or your employer send you off somewhere. You choosing to apply for a job in a different country and choosing to leave your spouse behind for 5 yrs is your decision not something that has to be done and is kinda permanent!
Sending money to them is all good and well but that alone does not prove a committed defacto relationship. Does not even prove dependency if she works and/or gets benefits. A defacto relationship includes a shared life which is quite difficult when you are thousands of miles apart!
What visa do you propose you get that lasts 5yrs if you have no qualifications?