City costs are inflated by exploitative landlords.
Suburb costs are subsidized by basically all the infrastructure for them; none of it pays for itself. Not the roads not the wiring not the water and sewer. Yes I know everywhere has roads, but suburbs demand a high standard of them and don't produce anything with them.
Youre not being space efficient like a city, or (whatever degree of) self sufficient like the country, so everything is just car trips, any time you leave the house. Like in OP.