What costs money after the purchase
The body is the visible part of the budget. Then come cards fast enough for the format, batteries in sufficient number, storage able to absorb a week of rushes, and the second copy that lives somewhere else. These lines are rarely costed at the moment of decision, and they are the ones that decide how the shoot ends. Usually well. Occasionally with a lost file.
Dropping a grade so the rest stands up
We often propose a cheaper body than the one asked for. Not out of commercial caution, but because the difference in image between two neighbouring grades rarely survives the final export, whereas the absence of a backup always shows. Money moved to storage and glass works for longer than money put into the sensor.