"I expect it will set us back by a day or so, but I think a side trip will be worthwhile.; Having the mindset that you "can't" reach your goals is only going to set you back."
2.VerbTo remove from or allow distance.
"Set it back from the road by twenty or thirty feet."
3.VerbTo install or position behind a boundary or surface, or in a recess.
"The statue was set back in a niche."
4.VerbTo cost money.
"How much do you suppose that fancy dress set her back?"