but total cost of home ownership is supposed to be 33% of take home. how do you pay electric, gas, internet, trash, water, sewer, umbrella insurance, AND routine maintenance on just 3%?
Utilities normally wouldn’t be included in the 33% of take home rule - the 33% rule applies to renting an apartment too, where most of the items you listed except trash are also separate costs not included in the 33%. (Also the 1/3 rule is of gross income not take home.)