You don't need "crazy money" to sponsor her

There's no minimum income required, as long as you're not bankrupt or on social assistance, then you can sponsor.
Here's the forms you would need, I suggest you start with the guide:
http://www.cic.gc.ca/english/information/applications/fc.asp
You can sponsor her as either your spouse (for which you have to be married) or your common-law partner (for which you'd have to live with her for at least 1 year continuously). You can not sponsor someone who is a girlfriend or fiance only.
There is also the conjugal partner category, but it's intended mainly for those who can not marry and can not live together for 1 year.
The processing times for different visa offices are here:
http://www.cic.gc.ca/english/information/times/international/05-fc-spouses.asp
The office responsible for Ethiopia is Nairobi and I'm afraid they have one of the longest processing times out there. Looks like you're looking at least a year, probably more before the application will be processed. You have a 30% chance of it being processed in 17 months or less, but it can also take 2 years.
Anyway, read the guide first. That will give you some idea of what you're dealing with.