If the tenant is already questioning the increase, treat that as a signal to check the figure and the evidence before the dispute hardens. The goal is to know whether the rent is the problem, or whether the file just needs stronger preparation.
A tenant can push back for different reasons. The evidence might be thin, the dates might be messy, or the proposed rent might simply sit too high compared with the strongest local listings.
The checker helps separate those problems before you pay for the next document step. That matters because a pricing problem usually needs a pricing decision, not just more paperwork.
If pushback is already likely, the Defence route is often the more sensible paid step because it keeps the response materials, argument structure, and supporting evidence together from the start.
Used together, the checker answers where the figure sits and the Defence route helps prepare the file if the tenant keeps pressing the point.