construction cost; set-up cost
Refers to the expense of building, installing, or establishing something, such as infrastructure, facilities, or systems.
The construction cost for the new factory was higher than expected.
maintenance cost
Refers to the ongoing expense of keeping something in good condition, such as equipment, vehicles, or facilities.
We budget for equipment maintenance costs every year.
建設費 specifically means 'construction cost' for buildings or large structures, whereas 整備費 is broader and includes set-up and maintenance.
Compound of 整備 (せいび, 'maintenance, preparation, development') + 費 (ひ, 'cost, expense').