Exodus Chapters 25-26
These chapters detail the specifications God gave to Moses in order to build, “…a sanctuary for [God], that [He] may dwell in [the Israelites’] midst.” Among the things God told them to use was gold, gems, and elaborately embroidered fabric. This sanctuary was the Ark of the Covenant.
This is evidence that God approves of us using very expensive items to build sanctuaries for Him. A Church is a sanctuary, so this excerpt supports that God has approved of using money to make a beautiful church in some cases.
Citation: The New American Bible. Revised ed., Confraternity of Christian Doctorine, Inc., 2010.