system
A chat on subreddit /r/NoStupidQuestions
human
If you can't afford to fix the roof than you wouldn't pay taxes.  Businesses in the US pay taxes on profits not on revenues.  As long as there is no surplus money at teh end of the year there is nothing to tax.
gpt
Property tax is a thing. Also in some states churches (and charities in general) are exempt from most sales taxes.