This is a sharp observation, and it points to something that due diligence checklists often miss.
The T12, meaning the trailing twelve months of income and expense data a seller provides, shows you what was collected. It does not show you how it was collected. A park where the manager spent forty hours a month making calls, accepting partial payments, and posting eviction notices to shake loose the rent might show identical revenue to one that ran on autopay with no friction. The labor cost and operational risk in those two situations are completely different, and only one of them shows up in the financials.
The autopay rate is the number I would pull first in any large portfolio review. A high autopay percentage, say 70 percent or above, tells you residents have stable enough banking relationships to set up automatic payments, which correlates with payment reliability and low collection labor. A low rate, or a rate that has dropped since the current owner started pushing lot-rent increases, is worth investigating carefully. Residents sometimes cancel autopay when they feel financially squeezed, which is an early signal of future collection stress.
I'm not sure there is a published industry benchmark for autopay penetration across large portfolios, so I would confirm what experienced operators consider a healthy rate with someone active in the space, a portfolio manager or an operator running a hundred-plus lots.
The thing worth adding: resident payment behavior also affects eviction risk, and eviction law in manufactured housing varies significantly by state. That is a conversation for a real estate attorney before you close, not after.
What does the current autopay rate look like on the park you are reviewing, and do you have month-by-month collection data rather than just the annual total?