Well I have rented church kitchens, and maybe there is some information misssing here. OP will no doubt fail to get the message, but for the rest of you, here it is:
US churches are registered with the IRS as NON PROFIT organizations.
When a BONA FIDE MEMBER of a church congregation rents their church kitchen for a ONE TIME ONLY event, there are many EXEMPTIONS to the food rules that kick in.
When a FOR PROFIT BUSINESS rents church space on a regular basis, then the church might have to comply with the full set of food safety regs as if it was in fact a restaurant or bakery. Which will cost them $$$ and might even require them to upgrade their facilities and certification. FYI the same applies to daycares and other regulated activities using church space on a REGULAR basis instead of an EVENT basis.
I believe that the church people took the OP's request to their legal advisor who pointed this difference out to them. They did their due diligence according to the laws of your state. Yes no doubt the OP will accuse me of some new sort of offensiveness...that's just the OP.
Here while I'm at it are more facts: the OP showed in her budget that she is deducting her personal household expenses off her business income to calculate profit. Sorry babe but that will get you kicked real hard by the IRS...in back taxes and penalties and audits until kingdom come. Your business finances must show all BUSINESS expenses and they can pay you an hourly salary and all employment taxes. You should file and pay those employment taxes so that you can collect benefits.
Your car gets a mileage allowance for expenses according to the miles logged for BUSINESS not the total. Your house rent (when you MUST use a rented kitchen) gets prorated by floor area for office space--and your personal grocery bill simply cannot be part of your BUSINESS finances. You seriously need to get a local accountant to advise you. Call me all the names you want...when the IRS invites you to a business meeting it ain't gonna be no picnic.