Turn cost per placement is the number most coaching programs skip entirely

Separate lines hide the relationship, which is exactly the problem.

My 2019 duplex in Mesquite, I underwrote turns at $450 and vacancy at zero because I figured I'd just re-rent fast.

Averaged 23 days empty across four turns that first year, killed about $2,800 I never modeled.

"Oversight or whether instructors avoid it," I think it's simpler than either: most instructors built their numbers on low-turnover portfolios and never felt the drag personally.

What's your actual turnover rate on the building you're stress-testing this against?

The combined figure is the right way to model it, and the programs that split it into two separate lines are usually doing so because their pro forma template predates any serious scrutiny of the number. Two separate lines let a student focus on the turn cost as a controllable expense and mentally file vacancy as a market variable, which obscures the relationship between them. The actual cost of a placement decision is the physical turn cost plus the income foregone during the gap, and those two numbers move together based on the same upstream variable: how long the unit sits.

Your 18-day assumption is the number doing the most work in that model. At 18 days on a $900 unit the vacancy drag is $540, but if average days-to-lease is actually 25 days in a softer submarket, that figure climbs to $750 per turn and the annual drag on your 20-unit example goes from $3,240 to $4,500. A student who learns the combined-line method but plugs in an optimistic days-to-lease figure has the right structure and still gets the wrong answer.

The risk you have not named is on the leasing-strategy side of the curriculum. Teaching the combined figure is necessary, but it is only useful if the program also covers what actually compresses days-to-lease: pricing relative to the submarket, listing timing in the lease cycle, whether the PM is running overlapping showings or sequential ones. If the curriculum teaches the math without teaching the operational levers that move it, the student knows what they are losing but has no mechanism to change it.

On your question about intent: I cannot tell you whether the omission is deliberate, but the programs most likely to skip it are also the ones built around case studies where the numbers are already closed and performing. A stabilized asset with low turnover makes the vacancy-drag line look immaterial, so it never gets built into the template.

What is the days-to-lease figure the programs you reviewed were using, and was it sourced or assumed?

The separation into two lines does more than hide a number, it hides a decision. When turn cost and vacancy drag sit in different sections of a pro forma, a student optimizing one never sees the effect on the other. Cut the repaint budget by hiring cheaper labor and the unit takes four extra days, which at $900 a month is another $120 gone, so the "savings" evaporated before the paint dried. A curriculum that keeps those numbers apart trains people to manage costs in isolation, and that habit survives into real ownership.

The part that changes the picture here is placement strategy itself, because this is where wholesale and assignment thinking actually has something to teach buy-and-hold operators. A wholesaler pricing a deal models holding cost by the day because every day of carry is a real number with a real rate attached. That daily-cost discipline, applied to a turn, reframes the whole question: the cheapest contractor is rarely the one who minimizes placement cost, the fastest contractor who meets a quality threshold is. If a program teaches leasing and turns without ever running a "cost per day of vacancy" figure alongside the contractor bid, it is missing the variable that determines whether a slightly higher turn budget pays for itself in days recovered. Did the program you went through give you any framework for trading turn cost against vacancy duration, or did it treat them as two unrelated line items with no conversion rate between them?