Detail
What this table doesn't show
It doesn't show the 3% to 8% annual rent increase your landlord can apply at renewal. It doesn't show the security deposits you'll forfeit between moves, the application fees, the pet rent. It doesn't show inflation eroding the relative value of a fixed mortgage payment that — unlike rent — does not climb every twelve months.
In other words: the right-hand column is the floor of what twenty years of renting costs, not the ceiling. The actual number is meaningfully higher.