By room size, by income, and evenly — side by side, so you can see how much the choice of rule is actually worth before anyone argues about it.
Five gates, in order, each with a number you can compute. Includes the 50-state break-even table built from each state's own property tax, insurance and appreciation — and why that table is not a forecast.
The cash a move actually takes, split into what comes back and what never does — because a deposit and an application fee are different kinds of money and averaging them hides the real cost. Covers the lines people plan for and the ones they do not: the overlap month when two leases run at once, utility deposits, cleaning the old place, and unpaid time off. Gives you the total as a multiple of one month's rent so you can see whether yours is normal, a straight answer on whether your cash covers it, and a before-you-sign checklist built around the evidence that actually decides a deposit dispute.