I want to be a Opel zafira van with manual transmission, please advise me is it a strong and rugged vehicle?v

They use opel basically more in northern Nigeria. I guess part will also be cheaper, technicians too will be available in the north.

Go for it if it's a tokunbo and maintain it well wherever you are gonna use it. Also you can go to the local parts market in your area and find out about the brand parts.

Be sure it's a left hand drive as against the popular right hand. Conversion might have been done when you see it In a left hand drive