My wife was hesitant to help, but the whole install for the OPOR sliders was maybe an hour, and that included redoing one side because I didn't like how it was positioned. I only needed her to help me hold half the weight while I got the first 2 bolts on, then we slid in a jack stand to hold the rest of the weight.
If you convince her that the tread plates on the sliders are for her benefit (and the kids), which my wife really wanted, then getting her to help should be no problem!