There are larger, Lakewood in Houston runs a budget of $70 million.
But I believe most people don’t attend a church of this size.
Houston has the largest two churches nationwide by population, membership 2013.
Lakewood ChurchHouston, TXPastor: Joel Osteen#1 - Attendance: 43500
Second Baptist ChurchHouston, TXPastor: Ed Young#2 - Attendance: 23659
100 largest churches;
http://www.sermoncentral.com/articleb.asp?article=Top-100-Largest-Churches
Yes, but I wasn't sure whether to consider it a church. Same with Jake's megaplex in Dallas.
St. Martins claims 9K members. I know at least one church about half that size in Dallas that has a bigger budget. An another that doesn't, but probably will hit that in a year or two now that it's bought its way out of its liberal denomination.
The Anglican church in Plano runs a $5 million budget on roughly 3000 members. http://www.christchurchplano.org/uploads/documents/Annual-Financial-Report-2015.pdf
So the numbers don't strike me as being particularly large for a church located between River Oaks and the HCC.