If you're a Canadian citizen your wife won't be able to get an OWP under family class unless she first applies Inland and then sends in an application for OWP at the same time. There's currently a pilot program that is allowing applicants in family class to work after AOR which is taking approximately four months (according to CIC - it may be quicker). However, I'd expect an influx of applicants in the Inland sector because of this program, so wait times for final approval are likely to be over two years.
If your wife is from the States, I'd highly suggest doing Outland - although she wont be able to work, she'll be approved in around 8-10 months.