Build software using contractors.

Use software to make game using contractors.

Finish game, end contracts with contractors.

Company now has literally no-one on payroll who still knows how to do anything with their "in-house" tools.

Fuck everything up for years, and get literally nothing done, because you keep trying to finish things with a revolving door of contractors who all have to learn to use your in-house crap made by other contractors who aren't around to answer questions or update documentation.

Switch to UE5 because all the contractors already know how to use it, as you won't consider hiring actual employees again.