EV might be better for Bangladesh than traditional cars. Start off with simple components that foreign companies can invest in while universities research import replacement for advanced components like batteries or motors. Traditional cars are too saturated.I completely agree with what you proposed for BD to start with. However, when our people are unable to produce a simple engine or electric motor, our govt is talking about aeronautieucal engg, and some of our brats here are proposing to produce high end Electrical Vehicles (EV) as BD has a magic lamp and we have just to wish anything.
Aerospace doesn't actually make money except from governments. Even South Korea and Japan struggle with aerospace. The only countries with independent aircraft manufacturing capabilities are US, Russia, China and EU. Maybe Bangladesh can lease land for an international spaceport, and provide services to satellite launchers as long as they bring their own rocket.