Is taking one's daughter to a nursery for 1500 pounds considered extravagance, knowing there's a nearby nursery of a lower standard for 30 pounds per month?

A Muslim is obliged to be moderate in spending, due to the Almighty's saying: "And those who, when they spend, do not squander nor are stingy, but are ever between that [justly] moderate." Extravagance varies according to a person's financial situation, whether rich or poor. It is better to live moderately and economically, and to abandon luxury.