1.
If something sets you back or sets back a project or scheme, it causes a delay.
It has set us back in so many respects that I’m not sure how long it will take for us to catch up...
There will be a risk of public protest that could set back reforms.
PHRASAL VERB : V n P , V P n (not pron)
2.
If something sets you back a certain amount of money, it costs you that much money. ( INFORMAL )
In 1981 dinner for two in New York would set you back £5.
PHRASAL VERB : V n P amount
3.
see also setback