That's okay, Mayor, I've about got it done after making dumb mistakes.
Yes, it's for handicapped. My wife just had a second total knee replacement, and the new bathroom doesn't have anything for her to use to pull herself up. The studs are wrong for the length/style of bar that I have, so I'm using toggle bolts. Each end-cap has three holes for the fasteners, I can fit one hole to a stud and the other two miss the stud entirely.
If you find that is not strong enough, cut out a piece of drywall, add a piece of 2x4 between studs and put the drywall back over it.
It's not that hard to do.. I hope she gets better fast.