This is the equipment that is available with FWO.
https://www.fwo.com.pk/features-mainmenu-47/summary
PA not only has combat engineering battalions but is backed by FWO assets as well. That is tens of thousands of support troops and civil/retd element.
These all assets when push comes to shove will be used in war effort.
However, with a minuscule budget how do we finance, train and maintain a capability for war effort. You use the assets in civil sector so that these assets are adequately trained for war effort while generating revenue in order to remain self sufficient.
Instead of being a white elephant, FWO is currently engaged in several motorway projects on project financing basis. I know so because the department that I work for in a bank has financed two of these projects.
FWO is also currently going for own cement plant (if the economic conditions allow so). 50-70% of the the capacity will be used for own captive use. They have become so big that they need own cement plant in order to ensure the raw material availability and to control the cost of raw material.
Going forward you can expect FWO to expand its foot print further.
Better to use FWO in a Joint venture instead of a foreign firm considering the ample human resource available in Pakistan.