I've served as a deacon at our Church, so I got a chance to see the money side of things. A church like this probably has about a $1M annual budget. They probably support a number of missionaries, outreach programs, causes, etc which may represent 10-20% of that budget. A church of this size probably employs 6-8 people, both full time & part time, which represents 50% of the budget. They probably pay the lead pastor $100K/yr provides a house on campus or gives a housing allowance to the maximum allowable by the IRS. The rest of the staff includes a full time secretary, office helper, custodian, youth pastor, associate pastor, worship leader, kids program leader, etc. The rest goes to paying the bills to "keep the lights on" as well as build up funds for major building/property renovations, etc.
I don't think "net worth" is really a thing to judge a church on. They often own the building, and sometimes will have large donations in savings funds that kick out 4% every year (similar to a FIRE concept) for some special thing that would be included in their NW that is not necessarily money they can just spend on whatever. Most churches are open an honest about how the the budget is spent at a high level. If you are there for a year, it will probably be announced that the budget is available for comment once a year.