Thank you John for your reply.
Im plaing on going for the Dust specification
Over head exanst mufler (So exhaust will not create more dust)
And there is a Cool tyre called Airboss tyres (solid tyre with holes gone horizontaly so it will absorbed shock)
Any idea about the Airboss tyre wear pattern ? are they good ? (Just saw on the brochure)

And as for maintenance will i need to keep a spare radiator for the job ?

What would be the problem areas when it comes to maintenance that i should be aware of ?